Took my parents. Apartment 62kv with carpets in 2 rooms. Comparing with the robot 1S version, I see too many weaknesses, I do not advise buying under such conditions. 1. Weak battery, it is not enough for a complete cleaning in standard mode. 2. Dumb, driving the same route too often, wasting power. 3. Too long cleaning time in the end. Ps. My 1s 2k apartment is 60 sq. Cleans in 50 minutes and spends 40% of the charge on it. This light rubs and beats in the corners for 1.5 hours, as a result, it leaves for charging without completing the cleaning cycle. Then more than 2 hours of charge and you must again choose the time when it will not interfere .