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alaScore 77

133 reviews

Dec, 2015

alaTest has collected and analyzed 133 reviews of DYSON DC21. The average rating for this product is 4.5/5, compared to an average rating of 4.1/5 for other Vacuums for all reviews. People are impressed by the size. The design is also mentioned favorably. Opinions are divided on the price, while many are negative about the reliability.

usability, design, size


We analyzed user and expert ratings, product age and more factors. Compared to other Vacuums the DYSON DC21 is awarded an overall alaScore™ of 77/100 = Good quality.

Review analysis

(Based on 133 reviews)

Expert Reviews  

User Reviews  

Showing 63 review(s)

Expert Reviews User Reviews


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Showing 1 - 10 of 63 Show Reviews: in English | in other languages (70)

Expert review by: Reviewboard Magazine (

Dyson DC21 Review

May, 2010

Expert review by: Consumer Guide (

Dyson DC21 Motorhead Stowaway Canister Vacuumm Review and Prices


With a $500 price tag, the Dyson DC21 Motorhead Stowaway Canister Vacuum has a lot to prove -- right out of the box.

5-year warranty, HEPA filter, powerful suction, ball joint steering

Price, short power cord

Jul, 2008

Consumer review by: ch59 (



In love with my Dyson at first....

Removes loose fibers from 'shedding' carpet

Bristles on power head are damaging

Mar, 2011

Consumer review by: ironman2009 (

Fan of This Machine


We bought this Dyson on the recommendation of a friend. We've had it for almost two years now and have no real complaints to speak of. The canister style means less back work and more maneuverability than a full upright. The wand can ...


Semi-short Power cord

Jul, 2009

Consumer review by: ironman2009 (

Fan of This Machine


We bought this Dyson on the recommendation of a friend.  We've had it for almost two years now and have no real complaints to speak of.

ManuverablePowerfullReliableEasy to clean canister

Semi-short Power cordWeak power cord retractionWand extension lock

Jul, 2009

Consumer review by: goumcanes (

Dyson DC21 rotten skunk smell


Simply fantastic vacuum.  Power cord WAAAYYYY to short.  Cheap plastic for a $400 vacuum may lead to issues in the future.  BEST suction ever..horrid smell if you wash canister.

superb suction and ease of use

short power cord cheap plastic hose   Horrible smell after cleaning collection unit

Jun, 2009

Consumer review by: Anonymous (

Near Perfection!


This vacuum has is an excellent product. Picked up in one cleaning what my old kenmore took a month to pick up! The canister is easy to empty. I did not find it messy at all. The cord is short which is a pain. And I found that the hard floor attachment...

Mar, 2009

Consumer review by: vacuumdad (

Kenmore Canister is Better


I've used many Kenmore canister vacuums over the years and always felt they were strong performers and an excellent value. This Dyson has comparatively weaker suction than my last Kenmore, a very short power cord and creates more noise. It also has an...

Mar, 2009

Consumer review by: workhardmom (

Great canister...


I went to Sears the guy over there showed me the demo and I was sold out, and I used at home it works great, it sucks like its sipping a coffee :) , just have to be careful what you are vacuuming if u have to vacuum 3 dimensional, cobweb use the...

Jan, 2009

Consumer review by: _kc_ (



Never in a million years would I have ever considered buying such an expensive vacuum. BUT... having recently moved from a house with wall to wall hardwood flooring to an apartment that is wall to wall carpeting - AND - housing three furry cats - AND ...

Excellent for pet hair, HEPA filtering system & swivel head

Power cord short

Dec, 2008

Product Specifications

For most people the act of housecleaning isn't an automatic (or positive) behavior. It is, nonetheless, necessary. So you want it to be as efficient and as easy as possible. Say hello to the Dyson DC21 Stowaway Bagless CanisterVacuum Cleaner. It may even change the way you feel about cleaning your home. Using its patented Root Cyclone Technology the Dyson DC21 actually separates dirt from air. Because it doesn't rely on bags or conventional filters, the end result is remarkable suction that thoroughly cleans nearly any carpet and surface in your home, and significantly reduces the amount of bacteria and mould you breathe. The wide 12.5 inch cleaning path picks up more dirt and dust, and a large debris channel allows larger pieces to be filtered in the canister. A versatile brush control function can be adjusted to protect delicate carpeting or thoroughly cleans hardwood and vinyl flooring, and the 12 foot hose with several handy attachments makes it easy to vacuum harder-to-reach places where dust and dirt accumulate. A user-friendly design allows the DC21 to maneuver around your furniture with the slightest turn of the wrist while the automatically retracting 16.4 foot power cord gives you extended reach and better access in every area of your home. Clean-up is a snap - with the hygienic and easy-to-empty bin. Finally, the washable filters are easy to clean and never need replacing.