Function well. Stability, well. Quiet, no!

The basic function (ventilation) controls the part, because there is nothing to complain about. Use and processing are perfectly fine. The praise to the stability of other reviews I can not understand. Sure, the base is heavy and therefore the device safely falls not so fast times around. The standpipe itself wobbles in the extended state but even with light touches. In principle, this is no problem, under steady state but I imagine yet otherwise.
Last volume: With "Silence" I would not just evaluate the part. Stage 1 goes absolutely with background noise (music, ...) in order. If the room is quiet you can hear the machine whirr even from 5m distance very clearly. But! Something else I expect from a fan not at all, after all the noise does not come from the engine but from the turbulence of the air. Better, the only with much larger blades are the size of each can be read from the description. For this you can egtl. deduct any point. I do it yet, because the manufacturer the device is applying unnecessary as "Silence" and this not by a slower-speed mode 1 (yes, here all devices could egtl. Be a tad slower) justifies.

In principle, you can recommend this product without hesitation. Who has come to terms with the fact that these fans Bauert / size nunmal can not be silent is certainly satisfied with the device. However, you can safely buy a much günstigers device, because almost everything is what usually criticized revolves around volume and false expectations!