Super quiet
I got it because my little laptop had a tendency to overheat during shows with the heat in the control room, causing a whole host of problems. The cooling is effective, the PC is cool to the touch, well placed and slightly raised. The cooling is quiet enough to be used during recordings with a static microphone, so I'm very satisfied.
-1 for the quality of the plastic, which sometimes moves a bit, but for the price it's perfectly adequate.