Summary: Decent little fans. I have a 7870 in my current setup, and before installing these case fans it would approach 80 degrees in a Furmark test after minutes. Now, with two of these fans blowing directly onto the GPU, temps remained stable at 69 Celsius 30 minutes into a Furmark test. Pretty happy with the results.
Summary: Ordered 6 for my case, 5 of them arrived and work perfectly. Unfortuantely the 6th is DOA. By the time you pay for gas and shipping to send it back its more than the fan cost. So I guess its a loss at this point.
Summary: Smooth running, beautiful glow and Ssssssh; its silent. I was a little apprehensive when buying because a couple of reviewers complained about this fan. Seems like some people just complain because they CAN. Buy this!
Summary: I've had the same four of these chuggin along for 2-3 years now. 2 of them have 2 out of 4 leds burnt out while the other 2 still look new. These are by far the longest lasting 80mm fan I have used. All of them still hold their original rmps and I believe they would last a lot longer but I am replacing due to noise.
Cons: With 4 of them it gets a little loud. I never had an issue till I decided to move the pc on to my desk to help cut down on dust.