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Bosch BGLS4A444 Cosyy'y Pro Family Review | 52 Data compared

Avg. price:~£110Suction power (AW):?Battery runtime:N/A minutesCapacity:4 LWeight:4.5 kg

Bosch BGLS4A444 Cosyy'y Pro Family Review: Compare 52 technical specifications and user reviews to see how this product ranks in the Vacuum Cleaners category and whether it is worth buying.

6.8

Overall score

Score
6.8/ 10
✕
What it is
An overall evaluation of the vacuum cleaner's quality, based on technical analysis and user reviews.
When it matters
When you need a quick reference for identifying the best vacuum cleaners on the market.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 51% of models
Score components

80%

6.4

Technical Score

20%

8.5

User score

â–²Better than 51% of vacuum-cleaners
6.4

Technical Score

Technical score
6.4/ 10
✕
What it is
An assessment of the vacuum cleaner's technical performance across six key areas: performance, battery and power supply, filtration, attachments, design, and smart features.
When it matters
When you want to compare vacuum cleaners by cleaning performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 60% of models
Score components

28%

7.9

Performance

22%

4.2

Battery

18%

8.6

Filtration

14%

6.0

Attachments

10%

5.7

Design

8%

4.0

Smart features

â–¼Worse than 60% of vacuum-cleaners
8.5

User score

User score
8.5/ 10
✕
What it is
A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
When it matters
When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 80% of models
Score components

70%

8.6

User ratings

30%

8.1

Number of reviews

Based on 1,510 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
â–²Better than 80% of vacuum-cleaners
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Best prices

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Best rankings

Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Verdict

The Bosch Cosyy'y ProFamily BGLS4A444 is a corded, bagged cylinder vacuum cleaner equipped with a 700-watt motor, a 4.0-liter dust bag capacity, and a 10-meter operating radius. Its main characteristics include an UltraAllergy hygienic filter that traps 99.99% of fine allergens and a unique ToyGuard attachment to prevent small parts from entering the dust bag. Key pros include an exceptionally quiet operating noise of 69 dB(A) thanks to the SilenceSound System, manual power adjustment with the ComfortRegulator, and consistent suction performance via the PowerProtect system even as the bag fills. On the downside, the unit can feel slightly bulky or heavy at 5.8 kg, its plastic exterior is prone to surface scratching, and some users note that its high suction power can occasionally lift lightweight rugs, making it harder to maneuver.

Technical Specifications of vacuum cleaner Bosch BGLS4A444 Cosyy'y Pro Family

Technical Score
Technical score
6.4/ 10
✕
What it is
An assessment of the vacuum cleaner's technical performance across six key areas: performance, battery and power supply, filtration, attachments, design, and smart features.
When it matters
When you want to compare vacuum cleaners by cleaning performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 60% of models
Score components:

28%

7.9

Performance

22%

4.2

Battery

18%

8.6

Filtration

14%

6.0

Attachments

10%

5.7

Design

8%

4.0

Smart features

6.4
Bosch BGLS4A444 Cosyy'y Pro Family has a technical score of 6.4 points, which is lower than 59.7% of vacuum cleaners.
User score
User score
8.5/ 10
✕
What it is
A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
When it matters
When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 80% of models
Score components

70%

8.6

User ratings

30%

8.1

Number of reviews

Based on 1,510 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
8.5
Bosch BGLS4A444 Cosyy'y Pro Family has a user score of 8.45 points, which is higher than 79.9% of vacuum cleaners.
Popularity
Popularity
8.1/ 10
✕
What it is
An indicator based on the number of reviews received by the vacuum cleaner.
When it matters
When you prefer a vacuum cleaner that has been chosen and reviewed by many other buyers.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 73% of models
Popularity:
Bosch BGLS4A444 Cosyy'y Pro Family has a popularity score of 8.1 points, which is higher than 73% of vacuum cleaners.
8.1
Bosch BGLS4A444 Cosyy'y Pro Family has a popularity score of 8.1 points, which is higher than 73% of vacuum cleaners.
Ratio quality/price
Value for money
7.8/ 10
✕
What it is
An indicator that combines the vacuum cleaner's overall score with its price.
When it matters
When you are looking for a vacuum cleaner with a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 60% of models
Score components:

60%

6.8

Overall score

40%

9.9

Price

7.8
Bosch BGLS4A444 Cosyy'y Pro Family has a value-for-money score of 7.8 points, which is higher than 60% of vacuum cleaners.
Suction power (AW)
?
Suction power (kPa)
?
Airflow
?
Motor type
hispin
Power consumption
700 W
Power consumption
700 W
â–¼ Worse than 61% of models
Market range: <165 W – >899 W
This vacuum cleaner draws 700 W, which is higher than the power consumption of 61.1% of vacuum cleaners and equal to that of 7.5% of vacuum cleaners.
Show more
Cordless
no
Cordless
no
â–¼ Worse than 50% of models
This vacuum cleaner does not work cordlessly. 49.5% of vacuum cleaners offer cordless operation.
Battery runtime
N/A
Charging time
N/A
Battery capacity
N/A
Battery voltage
N/A
Show more
Filter class
hepa
Filter class
hepa
â–¼ Worse than 38% of models
This vacuum cleaner uses filter class hepa, which is more advanced than the class used by 16% of vacuum cleaners and the same as the class used by 46% of vacuum cleaners.
Minimum overall efficiency
99.95%
Minimum overall efficiency
99.95%
â–¼ Worse than 41% of models
Market range: <95 % – >99.99 %
This vacuum cleaner reaches 99.95% minimum overall efficiency, which is higher than that of 32% of vacuum cleaners and equal to that of 26.9% of vacuum cleaners.
Suitable for allergy sufferers
yes
Suitable for allergy sufferers
yes
â–² Better than 18% of models
This vacuum cleaner is suitable for allergy sufferers. 82.4% of vacuum cleaners are allergy-friendly.
Capacity
4 L
Capacity
4 L
★ Better than 90% of models
Market range: <0.44 L – >4 L
This vacuum cleaner has a dust capacity of 4 L, which is larger than that of 89.9% of vacuum cleaners and equal to that of 2.6% of vacuum cleaners.
Bagless
no
Bagless
no
â–¼ Worse than 79% of models
This vacuum cleaner does not use a bagless design. 78.6% of vacuum cleaners use this setup.
Show more
Main brush type
classic
Roller type
none
Anti-tangle brush
no
Anti-tangle brush
no
â–¼ Worse than 26% of models
This vacuum cleaner does not include an anti-tangle brush. 25.7% of vacuum cleaners include this feature.
Mini motorized brush
no
Mini motorized brush
no
â–¼ Worse than 27% of models
This vacuum cleaner does not include a mini motorized brush. 26.9% of vacuum cleaners include this attachment.
Suitable for pet owners
no
Suitable for pet owners
no
â–¼ Worse than 72% of models
This vacuum cleaner is not suitable for pet owners. 72% of vacuum cleaners handle pet hair well.
Show more
Vacuum type
canister
Weight
4.5 kg
Weight
4.5 kg
â–¼ Worse than 63% of models
Market range: <2.15 kg – >7.1 kg
This vacuum cleaner weighs 4.5 kg, which is greater than the weight of 63.5% of vacuum cleaners and equal to that of 2.5% of vacuum cleaners.
2-in-1 design
no
2-in-1 design
no
â–¼ Worse than 53% of models
This vacuum cleaner does not offer a 2-in-1 design. 53% of vacuum cleaners offer this flexible format.
Self-standing
no
Self-standing
no
â–¼ Worse than 19% of models
This vacuum cleaner does not stand on its own. 18.9% of vacuum cleaners offer this convenience.
Adjustable tube height
yes
Adjustable tube height
yes
â–² Better than 53% of models
This vacuum cleaner includes adjustable tube height. 47.4% of vacuum cleaners offer this ergonomic feature.
Show more
Auto suction adjustment
no
Auto suction adjustment
no
â–¼ Worse than 20% of models
This vacuum cleaner does not support automatic suction adjustment. 19.9% of vacuum cleaners support this feature.
Dust particle sensor
no
Dust particle sensor
no
â–¼ Worse than 8% of models
This vacuum cleaner does not include a dust particle sensor. 8% of vacuum cleaners include this feature.
LED display
no
LED display
no
â–¼ Worse than 26% of models
This vacuum cleaner does not include an LED display. 25.9% of vacuum cleaners include this interface feature.
Nozzle light
no
Nozzle light
no
â–¼ Worse than 43% of models
This vacuum cleaner does not include a nozzle light. 43.4% of vacuum cleaners include this visibility feature.
Mopping support
no
Mopping support
no
â–¼ Worse than 4% of models
This vacuum cleaner does not support mopping. 3.7% of vacuum cleaners support this multi-function feature.

Bosch BGLS4A444 Cosyy'y Pro Family vs the average vacuum cleaner

246810TotalPerformanceBatteryFiltrationAttachmentsDesignSmart features
  • Includes parquet brush
    Parquet brush
    yes
    â–² Better than 77% of models
    This vacuum cleaner includes a parquet brush, the average vacuum cleaner does not.
  • Less operating noise
    Noise level (Min-Max)
    69-69 dB
    â–² Better than 87% of models
    Market range: <65 dB – >83 dB
    This vacuum cleaner is quieter than the average vacuum cleaner (69-69 dB vs 77-77 dB).
    69-69 dB vs 77-77 dB
  • 3 more power levels
    Number of speeds
    5
    ★ Better than 93% of models
    Market range: <1 – >4
    This vacuum cleaner offers more speed levels than the average vacuum cleaner (5 vs 2).
    5 vs 2
  • 3 L larger dust container
    Capacity
    4 L
    ★ Better than 90% of models
    Market range: <0.44 L – >4 L
    This vacuum cleaner has a larger dust capacity than the average vacuum cleaner (4 L vs 1 L).
    4 L vs 1 L
  • Includes full bin indicator
    Full bin indicator
    yes
    â–² Better than 73% of models
    This vacuum cleaner includes a full bin indicator, the average vacuum cleaner does not.
  • Adjustable tube height
    Adjustable tube height
    yes
    â–² Better than 53% of models
    This vacuum cleaner has adjustable tube height, the average vacuum cleaner does not.
  • 690 mm shorter body
    Height
    410 mm
    â–² Better than 70% of models
    Market range: <290 mm – >1.2k mm
    This vacuum cleaner is shorter than the average vacuum cleaner (410 mm vs 1100 mm).
    410 mm vs 1,100 mm
  • 5.7% higher user score
    User score
    8.5/ 10
    ✕
    What it is
    A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
    When it matters
    When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
    Score distribution
    â–¼
    â–¼
    <55-66-77-88-99-10
    Bosch BGLS4A444 Cosyy'y Pro Family
    the average vacuum cleaner
    ★ Better than 92% of models
    Bosch BGLS4A444 Cosyy'y Pro Family has a higher user score than the average vacuum cleaner (8.45 vs 8.000).
    8.45 vs 8
  • 5.7% higher user score
    User score
    8.5/ 10
    ✕
    What it is
    A rating that combines user reviews with the total number of reviews received by the vacuum cleaner.
    When it matters
    When you want to know how a vacuum cleaner performs in everyday use and how reliable owners find it over time.
    Score distribution
    â–¼
    â–¼
    <55-66-77-88-99-10
    Bosch BGLS4A444 Cosyy'y Pro Family
    the average vacuum cleaner
    ★ Better than 92% of models
    Bosch BGLS4A444 Cosyy'y Pro Family has a higher user score than the average vacuum cleaner (8.45 vs 8.000).
    8.45 vs 8
  • Less operating noise
    Noise level (Min-Max)
    69-69 dB
    â–² Better than 87% of models
    Market range: <65 dB – >83 dB
    This vacuum cleaner is quieter than the average vacuum cleaner (69-69 dB vs 77-77 dB).
    69-69 dB vs 77-77 dB
  • 3 more power levels
    Number of speeds
    5
    ★ Better than 93% of models
    Market range: <1 – >4
    This vacuum cleaner offers more speed levels than the average vacuum cleaner (5 vs 2).
    5 vs 2
  • 3 L larger dust container
    Capacity
    4 L
    ★ Better than 90% of models
    Market range: <0.44 L – >4 L
    This vacuum cleaner has a larger dust capacity than the average vacuum cleaner (4 L vs 1 L).
    4 L vs 1 L
  • Includes full bin indicator
    Full bin indicator
    yes
    â–² Better than 73% of models
    This vacuum cleaner includes a full bin indicator, the average vacuum cleaner does not.
  • Includes parquet brush
    Parquet brush
    yes
    â–² Better than 77% of models
    This vacuum cleaner includes a parquet brush, the average vacuum cleaner does not.
  • Adjustable tube height
    Adjustable tube height
    yes
    â–² Better than 53% of models
    This vacuum cleaner has adjustable tube height, the average vacuum cleaner does not.
  • 690 mm shorter body
    Height
    410 mm
    â–² Better than 70% of models
    Market range: <290 mm – >1.2k mm
    This vacuum cleaner is shorter than the average vacuum cleaner (410 mm vs 1100 mm).
    410 mm vs 1,100 mm
  • Not pet-hair friendly
    Suitable for pet owners
    no
    â–¼ Worse than 72% of models
    This vacuum cleaner is not suitable for pet owners, the average vacuum cleaner is.
  • No handheld conversion
    2-in-1 design
    no
    â–¼ Worse than 53% of models
    This vacuum cleaner does not have a 2-in-1 design, the average vacuum cleaner does.
  • No bagless design
    Bagless
    no
    â–¼ Worse than 79% of models
    This vacuum cleaner does not use a bagless design, the average vacuum cleaner does.
  • No soft dusting brush
    Soft dusting brush
    no
    â–¼ Worse than 73% of models
    This vacuum cleaner does not include a soft dusting brush, the average vacuum cleaner does.
  • No cyclonic technology
    Cyclonic technology
    no
    â–¼ Worse than 71% of models
    This vacuum cleaner does not use cyclonic technology, the average vacuum cleaner does.
  • 24.3% higher weight
    Weight
    4.5 kg
    â–¼ Worse than 63% of models
    Market range: <2.15 kg – >7.1 kg
    This vacuum cleaner is heavier than the average vacuum cleaner (4.5 kg vs 3.62 kg).
    4.5 kg vs 3.62 kg
  • 145 mm deeper body
    Depth
    410 mm
    â–¼ Worse than 83% of models
    Market range: <170 mm – >440 mm
    This vacuum cleaner is deeper than the average vacuum cleaner (410 mm vs 265 mm).
    410 mm vs 265 mm
  • 100 W higher power consumption
    Power consumption
    700 W
    â–¼ Worse than 61% of models
    Market range: <165 W – >899 W
    This vacuum cleaner draws more power than the average vacuum cleaner (700 W vs 600 W).
    700 W vs 600 W
  • No cyclonic technology
    Cyclonic technology
    no
    â–¼ Worse than 71% of models
    This vacuum cleaner does not use cyclonic technology, the average vacuum cleaner does.
  • 100 W higher power consumption
    Power consumption
    700 W
    â–¼ Worse than 61% of models
    Market range: <165 W – >899 W
    This vacuum cleaner draws more power than the average vacuum cleaner (700 W vs 600 W).
    700 W vs 600 W
  • No bagless design
    Bagless
    no
    â–¼ Worse than 79% of models
    This vacuum cleaner does not use a bagless design, the average vacuum cleaner does.
  • Not pet-hair friendly
    Suitable for pet owners
    no
    â–¼ Worse than 72% of models
    This vacuum cleaner is not suitable for pet owners, the average vacuum cleaner is.
  • No soft dusting brush
    Soft dusting brush
    no
    â–¼ Worse than 73% of models
    This vacuum cleaner does not include a soft dusting brush, the average vacuum cleaner does.
  • No handheld conversion
    2-in-1 design
    no
    â–¼ Worse than 53% of models
    This vacuum cleaner does not have a 2-in-1 design, the average vacuum cleaner does.
  • 24.3% higher weight
    Weight
    4.5 kg
    â–¼ Worse than 63% of models
    Market range: <2.15 kg – >7.1 kg
    This vacuum cleaner is heavier than the average vacuum cleaner (4.5 kg vs 3.62 kg).
    4.5 kg vs 3.62 kg
  • 145 mm deeper body
    Depth
    410 mm
    â–¼ Worse than 83% of models
    Market range: <170 mm – >440 mm
    This vacuum cleaner is deeper than the average vacuum cleaner (410 mm vs 265 mm).
    410 mm vs 265 mm

Graphic comparison of Bosch BGLS4A444 Cosyy'y Pro Family and other vacuum cleaners

No results found

Third-party reviews

Based on 1,510 buyer reviews from online shops.
Reviews last updated: July 2026 · How we calculate this
Read buyer reviews on Amazon →

What customers like about Bosch BGLS4A444 Cosyy'y Pro Family?

  • Exceptionally quiet operating noise (69 dB) that doesn't disturb others or scare pets
  • Strong and effective suction power, even on lower power settings
  • Long power cord providing excellent reach and coverage area
  • Innovative ToyGuard feature that catches small items like Lego blocks before they enter the dust bag
  • Effective UltraAllergy hygienic filter system that keeps the exhaust air clean
  • Lightweight design with highly maneuverable swivel wheels
  • Good overall value for the price and solid build quality

What customers dislike about Bosch BGLS4A444 Cosyy'y Pro Family?

  • Changing the dust bag can feel a bit fiddly
  • Plastic exterior shell is somewhat prone to scratches
  • Hose length feels slightly short for some users
  • Standard carpet/hard floor floor nozzle can be somewhat clumsy to steer
  • Leaves a faint film of dust behind on hard floors with certain attachments
  • The body stands on hard plastic when placed in the upright storage position
  • Slightly bulky footprint makes storage less compact

Expert reviews

In-depth analysis and verdict from leading tech publications

C
consumentenbond.nl
01/08/2019
Summary of the review
Bosch Cosyy'y ProFamily BGLS4A444 Review
(Translated)Show original

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