Well, I checked that the air in my apartment is perfectly clean =) Of course, it is up to you to decide whether to buy or not, but it seems to me that the thing is not very useful. Some pros: - Fits beautifully into the interior - Inexpensive filter and easy replacement Has cons: - 2 times I got a marriage, or rather problems with bearings on the lower fan. In Auto mode, everything is fine, since only the top fan works, as soon as you turn on any other mode, the bottom fan bearings start to crackle . At first I thought it would pass, but after 3 hours nothing has changed and the crackling began to really bother me the room with the air cleaner became uncomfortable. I went to change it, but the replacement one has exactly the same crack. Issued a refund - As usual, dancing with a tambourine when connected to MiHome, it only happened from 5 times.