The only complaint so far: For my place where the fan is running a bit too fast, slightly less revolutions would have done me well. Once the fan is covered on one side (eg lying on a ventilation grid / perforated metal / Notebook / ...) you can clearly hear a stream of air. The fan itself is almost silent. An on / off switch does not exist, which is not really disturbing. Furthermore, one should say that the fan is not well protected. The fan runs pretty exposed. As long as that is not tuned fumbling not bother us.
