I purchased this the other day:
The mouse works great, it's indistinguishable from my wired mouse. Oddly it's the keyboard that's giving me headaches. The key repeat doesn't seem to work right in games. I'll be driving a tank in desert combat - holding down the "w" key, and I'll just randomly stop. I have to release and repress the "w" key to resume moving.
Any ideas on how to fix that?