I had a small USB fan looking for some money, which can nevertheless really when working on PC Forgot the high temperatures. According to some reviews it is unstable, too weak or too noisy. But none of this is true (or only partially) Stability definitely very very good (for the price). I do not see how you can make from "accidentally" broken.? Ventilation and volume are perfectly okay! 2 levels can be adjusted. The first stage is in a comfortable volume (since the PC finally is not silent, you can hear the fan really hard). Although it does not release particularly Dolle, but loose enough to cool off. The second stage is then already much louder, however, I have also so far only used when I came from the sport back home and I needed a strong cooling.
On the whole, the fan for the price is simply brilliant. Strong buy recommendation from me!