Tested as a free product through the Revain Vine program. I've been using the Shark Ion Robot for about 6 months now and it looks, works and works in a very similar way with a difference or two. Like other vacuum cleaners, it is primarily controlled via the Eufy app for iPhone and Android. You need to register your account: after downloading the app, create and register an account with your email address. a bit fiddly but works well. One feature you might like is the ability to manually "control" the robot vacuum from within the app. This can be handy, but also a bit redundant as the intention was to set it and forget it I thought. Battery life seems good, managing to return to a home device about 9 times out of 10. Easy to use and clean, just remember to pull the hair and fibers out of the brushes when brushing to avoid tangling. Picks up an amazing amount of dirt and dust. Works very well on hardwood floors, not quite as well on carpet (quite thick). The biggest task is getting it clean BEFORE you turn it on, it pulls cords even when maneuvering around most things. Comes with smart strips that you can cut to length and install in restricted areas. Supposedly it has a "drop technique" to prevent falling down stairs, which I haven't tested as the device is expensive for a "drop test", I have a streak through that area anyway. Slightly cheaper than Roomba and other brands but works just as well in my opinion. which I find unpleasant, otherwise I am very satisfied with this device for the price. 4 stars