Cleaning performance on carpet they do a fairly good job of picking up the pet hair and other debris from the surface of the carpet
Cleaning performance on hard floors they all did better than average even picking up the much heavier sand with no trouble
Convertible handheld design the dirt devil and the eureka performing equally well
Crevice‑cleaning effectiveness both the Dirt Devil and the Bissell picked up the crevice debris in one pass
Price ultralight and extremely cheap
Weight Dirt Devil the heaviest
Just Okay
Maneuverability & swivel steering with the Bissell and the Dirt Devil you have to either shift your arm angle or body to change directions or just slide it sideways
Power-cord length & auto-retract (corded) the cord links ranged from 15 to 18 feet
Needs Improvement
Large-debris pick-up the dirt devil simpli-stik really could not pick up larger debris without picking up the vacuum