I purchased this model to replace the old Xiaomi vacuum cleaner, with the most basic functionality, which I was delighted with. This model, although it costs 2 times more, does not clean 2 times better, although the quality of cleaning is at a fairly high level. It is convenient to control it through the map, builds it quite accurately. Washes floors - by and large, it simply collects dust, of course, there is no need to talk about any serious pollution.