can second that, I bought the WoW MMO mouse on its lauch returned it to Amazon within the first week as the mouse button was faulty.
Year later after speaking with the Steel Series reps at Blizzcon they said that there was an initial faulty batch so went ahead and purchased another
That one went back to get replaced an additional two times with Steel Series as first of all the paint started to come off the exterior and then secondly the replacement completely died!
Bought a razer Naga after that and not one single problem with it, best mouse I have owned.