I have used logitech customer service before and they where good yeah. Wouldn't touch there products anymore though if im honest. But for me Corsair have been the stand out performers with RMA's. 3 times in the past 5 years they have taken something and brought back a replacement within 7 days, brilliant. Quite impressed with Phanteks too, bought my primo from Ocuk a few months back and one of the cables at the back was snapped, Phanteks sent a replacement cable within 5 days of calling them. If that is anything to go by, I will be using phanteks a lot more. I could have RMA'd the case to Ocuk but for just a small thing I wasn't that bothered. That snapped cable was why my fan controller wasn't working!!