I know what you mean. The mouse I'm using is actually my second one. The first arrive with a strange problem with the lazer, it could be that something happened during shipping but I don't know; either way razer let me return it and sent me another one for free. Their customer service was excellent, actually the best I've ever encountered. So I'm not too nervous if anything does go wrong, their CS will probably get it sorted out.
I'd also like to think that their computers are also built better than their standard accessories, I haven't really heard anything bad about their laptop yet and its been out for a while.