Pros: well thought out design, comes with silver thermal paste, 2 120mm fans, creates good air flow, no led lights
con: poor instructions ( read on for instillation tips)
My push pin cooler was not making even proper contact and causing high heat with freezes and and crash on full load. Temps used to be 43 c idle and 89 c full load (prime 95 stress test). computer was starting to freeze and restart upon first 10 min of gaming and video rendering. NOW!!!!!!!!!!!!!!!!!!!!! 28 c idle and 56 c full load. So happy I could cry. Even my MSI pro-E x58 north bridge chipset, which gets up to 76 c (and know for it high heat) went down to 64 c max under full load, thanks to the extra cooling of the 2 fans. I notice only slightly quieter then intel's stock cooler. But I don't care, I can render with handbreak and temps never go over 56 c. The air flow even dropped my video card temp 5 c and northbridge chipset over 10 c.
The fins are curved-in on one side to create a space that the fan doesn't get to close to to allow proper airflow. I would have to say directions for fan placement could of been better documented for newbies. The corsair logo side of the fan is the side the air will flow out from. bare black side pulls air in. So corsair logo goes to curved-in fins and the logo out fan goes to the fins that are curved outward. You will understand when you open the box. Logo out fan faces the back of the case or what ever way you air exhausts air out of the case. Also the rubber washers go on the plastic separator that is located on the back bracket for intel. Again lack of documentation. Fans go on heatsink after motherboard is screwed back in case and wires are plugged in.
Yes you will have to pull motherboard out to get this on. So what. if that is to much work for you, then don't get this heat-sink. You can't dock it stars for your lack of initiative to do it properly. Follow directions on screwing the heat sink on. one turn per screw going around clockwise till it is tightened in place to insure that it makes even contact. It comes with silver paste. Guys if you complain this woman made it work just fine.
Defiantly big but not a con cause I knew that when I purchased as well as I knew I had to pull MB so that is not a con. I have an Antec 900 case and it just barley fits with half inch from the side panel. I love the snap on fans. This design was well thought out. No led lights (I like that). watch out if you have high profile ram, or a large northbrige heatsink....measure. Posted a short video and picture of what it looks like in antec 900 with a msi pro-e x58MB, sorry for poor lighting it was night on video and pic better w/ flash (FYI on pic, fans were spinning over 2000 rpm and my fz35 camera makes them look like they are not moving)
Specs:
i7 930
MSI pro-e x58
6gb DDR3 1600 ram Kingston-x casl 8
NVIDIA gtx 275
PSU corsair 750 watt
case Antec 900