I'll add my flames to the fire. It's been a lesson learned the hard way; avoid Roccat at all costs. I bought a Kave headset and Kone+ at the tail end of last year.
The Kave was dead within a few hours of use, but an advanced replacement was offered by the retailer (not OCUK).
The Kone+ had rave reviews and the 'fixed' scroll wheel which swung my decision at the time. However, seven months in and the scroll wheel is broken. Recently, I have also had no end of ghosting / jumping problems (despite trying every setting imaginable in the drivers) and the decal on the back wore off after only a couple of months. Not what you expect for a near £70 outlay.
It's gone back for an RMA, but between Roccat and OCUK, I've really been given the run around. I originally sent a RMA request to OCUK, who directed me to contact Roccat. Roccat responded with a message that it was a hardware fault and I should contact OCUK for a replacement. After a couple of messages back and forth, OCUK offered me a refund, which was to be provided when the mouse wheel was confirmed as non-functional. Since then, I have waited over two weeks with no word.