I am very satisfied with the purchase, we have been using it since the beginning of the heating season. I have a stationary hygrometer, without a humidifier, the humidity is 28-29, with it, when the door is open, it rises 40-45, we are so comfortable, if the door is closed, it may still rise, we haven’t tried it, it’s enough for us. It catches dust a little, accumulates on the grid from above. Cheaper than analogues. If there is a need to buy a second humidifier, I will take model 400/4, where ySee full review