Well I've got one running in my system right now. It seems to be running great despite all the exploding I've heard about. The only bad thing is that the +5VSB rail is overvolting by a fair amount. You may be thinking its a good thing but the cable that it uses are very very stiff! My 20pin connector was sticking out of my case and it took me 7 minutes to get it to go in right. It has treated me well so far except the annoying cables.
And everyone is saying no 24 pin support but you can buy a 24 pin cable that is made for it.