This is my first purchase of a robot vacuum cleaner. Handsome, neat. When I turned it on for the first time, I was surprised that it works very quietly, not like ordinary vacuum cleaners, and even the sound of air suction is not audible. Doubt whether he vacuums well. Doubts quickly dissipated when he ran around the clean room, collecting dust. If you find fault, then after cleaning I find in 1-3 places small lumps of dust that got wet after its wet cleaning, which I pick up myself and throw it away. But this is not essential - with my love for cleanliness, the robot fully justifies itself. For some time I could not connect it to wi-fi, until my friends advised me to set the time zone to Shanghai in the application - I myself would not have guessed for sure. With wi-fi, of course, it is very convenient and visual. I am satisfied with the purchase.