Pros: 83% success rate

Cons: Four DOA -- I've heard others had worse luck. While it doesn't sound bad, it really sucks when you consider a bad riser could lead to hours of troubleshooting because you may not get obvious error messages. A bad riser on GPU 0 may lead to random GPUs dropping off the bus. I actually almost RMA'd my mobo because I thought that was the problem -- really annoying.

Overall Review: Buy extra risers. Buy 2x what you need, to be safe. I don't know why these guys can't test their parts before shipping. Furthermore, they ship in separate bags with each set being in a bag. The unfortunate thing is the little 1x cards are rubbing against the wires, etc. unprotected during shipping. I suspect this may be the reason so many are DOA.