Attachment variety & compatibility comes with two different types of brush head
Bag-replacement ease (if bagged) easy to remove and put in it's just with a click
Cleaning performance on carpet turbo brush basically that goes into the fibers of the carpet as you go lifting the hairs and then the suction pulls them out
Cleaning performance on hard floors better suited to hard surfaces
Cord management a cord that you pull out and then it just snaps back in with the to of the foot when you're finished with it really easy
Dust-bin sealing (to prevent dust escape) it's got this little flap on top to keep everything inside and it's double sealed as well
Filtration quality (HEPA rating, multi-stage) very good at trapping and dust and allergens
Maneuverability & swivel steering they are so small and they just run on these little wheels at the back here and they shuttle along behind you as you go
Noise level absolutely brilliant if you've got anybody with a noise sensitivity in the house because it's a quieter setting
Odor control / carbon-filter effectiveness traps in the odor too
Ongoing ownership costs (bags, filters, batteries) they come in a pack of four for around £10
Overall durability/longevity it's 15 years old and still going strong
Pet-hair pickup efficiency lift the hairs out of the carpet
Price come in just under £300
Status indicators & maintenance alerts bag fill indicator that turns orange when your bag is full
Suction-power feel (real-world) it is a really strong suction very effective
Tool-change simplicity click on click off heads which are just so easy to replace
Value-for-money represents value for money
Warranty they usually come with the 2-year guarantee