Airflow (CFM) very similar suction and airflow numbers as the original v15
Attachment variety & compatibility the v15s comes with a wall mount a combo dusting brush a crevice tool as well as a motorized upholstery brush
Automatic suction adjustment (dirt sensing) the v15s will automatically adjust its suction power up or down depending on how dirty the floor is
Battery runtime / Charging time Dyson says it can get 60 Minutes on low power
Cleaning performance on carpet it did excellent with both surface types
Cleaning performance on hard floors picks up fine debris pet hair and even large debris with Incredible ease
Filtration quality (HEPA rating, multi-stage) the filtration is extremely good it has Dyson's whole machine HEPA filtration
Hair-wrap prevention / anti-tangle tech Dyson's new anti-hair tangle system which removes hair from the roller as you vacuum which we found to be very effective in multiple tests
Large-debris pick-up picks up fine debris pet hair and even large debris with Incredible ease
Laser dust illumination it also has a green laser mounted on the side which is pointed at a precise angle to reveal dust on the floor that you can't normally see
Maneuverability & swivel steering I really liked its maneuverability its swivel and small size make it really easy and even kind of fun to use
Mopping performance (robotic or wet-dry) really excellent for tough dried on stains
Pet-hair pickup efficiency picks up fine debris pet hair and even large debris with Incredible ease
Replaceable-battery convenience it has an easy to remove battery as well in case you wanted to buy extras
Suction power (air watts) very similar suction and airflow numbers as the original v15
Value-for-money so in my mind it seems like a really good value
Just Okay
Liquid/spill pickup (wet-dry models) it was not very good with picking up dry debris or large wet spills
Assembly and Setup the Dyson V15s Detect Submarine is easy and fuss-free to set up
Battery runtime / Charging time the battery lasted for an impressive 76 minutes — which is longer than other cordless vacs I’ve tested
Cleaning performance on carpet quickly cleaned my carpet from dirt and dust in no time at all — making it look almost new again!
Cleaning performance on hard floors This enabled me to do a thorough clean, including all the spots that I would have usually missed without it
Dust-bin emptying emptying the waste bin canister is fuss-free; a simple pull down on the red lever opens the chute directly into the trash can
Edge-cleaning effectiveness allows you to get into corners and tackle edges of baseboards (without hitting them!)
Laser dust illumination Fluffy Optic cleaner head beams a bright laser to reveal the dust and dirt accumulation
Maneuverability & swivel steering I found it a breeze to push across my low-pile carpets and hard floors with ease, thanks to its swivel-head mechanism
Pet-hair pickup efficiency did a grand job in lifting up my long hair strands that were deeply ingrained into the fibers
Status indicators (battery, bin, filter) LCD screen gives you real-time information about performance, dust particles, run time countdown, and maintenance alerts
Suction power (air watts) its impressive, suction power quickly cleaned my carpet from dirt and dust
Tool-change simplicity The different head attachments easily swap out by its click-and lock signature red buttons
Weight Since the Dyson V15s Detect Submarine is lightweight, I didn’t find it a struggle to lift and carry around the home
Wet-dry 2-in-1 design 2-in-1 design for wet dry head
Just Okay
Mopping performance (robotic or wet-dry) After two sweeps, it did appear much cleaner, however, I did find it tricky to get into the tight corners and angles
Needs Improvement
Hair-wrap prevention / anti-tangle tech strands of hair would often get trapped into the crevices
Onboard tool storage No mounting spaces to store all the attachments
Self-cleaning mop function the only thing missing is an auto self cleaning mode to make the task quicker
Water tank capacity the head holds a small water tank — so it will never replace a full bucket