They're awesome. I just bought an 85$ Logitech combination laptop fan cooler, venter, cushion, and speaker system from Best Buy.
The difference?
Now I can actually run KOTOR2 and Neverwinter Nights 2 without my computer slowing way way down and eventually shutting off. Hell, NWN2 wasn't even playable before.
Also, the speakers sound amazing for how small they are.
All in all, it was a pretty awesome deal