Pros: Cheep, looks good reflects light from other areas
Cons: the screws that hold the fan in strip out very easily, the fan finally quit working after about a year. after about 6 months it slowed down and didn't even seem to do anything anymore. had to tap on it once and a while to get it to spin again.
Summary: Newegg is awesome!! I Live in Alaska and bought these over the weekend and received them in 3 days which is incredible! If you lived in this state you would understand how horrible delivery service is up here, but Lo and behold Newegg came through again.
Pros: They do precisely what they are intended to do: push more air more quietly. The blue LEDs are nice and bright though you can't see them much with cosmos 1000, which is why I bought them as the top mounts are designed for them. My case over is about 6 degrees cooler (Hey every little bit counts!)
Cons: I'm being a big whiny baby and deducting an egg for the quality of the four pin adapter. A little disappointing, but meh.
Summary: Thought about RMAing the fan with the stripped screw, but said forget it, since it's not rattling or anything. I'll just deal with replacing it when the time comes. The screws are also too small for the holes in the top of the NZXT M59 case, so to get the fans to stay, you have to install all four...
Pros: Quiet, moves a fair amount of air at low RPM.
Cons: The screws strip easily, like they are made out of sand that's superglued into a screw-like shape. I completely stripped one screw and I can't turn it at all in either direction.