Summary: I am using two of these in a render box to cool a pair of Intel Xeon E5645's in an older ATX mid tower (ASUS Z8NA-D6C for the motherboard). Despite a far from ideal overall cooling situation and extended, heavy workloads, they have have done an excellent job keeping the CPU thermals reasonable.
Pros: Their relatively narrow dimensions allow me to fit two of these on a dual-cpu ATX board. Reliable, even after some being subject to some high vibration environments.
Pros: Very good CPU cooler. I've had it for over 2 years and with a regular changing of the thermal paste it keeps my cpu between 40 - 55 C, depending on the game. The temps got a little too high while using Prime95, but then that program pushes your cpu to its limits.
Summary: It's a heckuva cooler, but it isn't worth 17 bucks more. Newegg had a great deal on a well made cooler a year ago.
Pros: Although a very large cooler, it fit in my case after I removed the side case fan that came with the case.
Cons: How does a product that cost me $19.99 a year ago go to $36.99 in a single year. I'd like to get a few more but I guess they think it's like gold. Actually I wish I would have doubled up on every component I bought a year ago, because now the same stuff would cost me an extra 300.
Pros: I bought these around Feb. 2013 and is now March 2014 for my first computer build ever. It does a great job keeping my cpu cool: between 35 to 45 degrees Celsius while playing Titan Fall, Battle Field 3, League of Legends, Diablo 3, Rome Total War 3 and more on highest setting. I recommend these ...
Cons: The heat sink is is tall. I was unable to use my large side fan on my Azza Toledo case; however, I made up with two 120mm fans.
Summary: Great value and excellent cooling capacity for standard and OC systems. Highly recommend. Use with Haswell processors and 1150 socket MB's.
Pros: Ice cold performance. Excellent cooling for standard use and overclocking. System stays in the 30 deg C range when taxed in standard configuration. 50-60 Deg C range when OCed. Highly recommend. Whisper quiet fan. Room temp cooling, my system never gets above 40C at high loads.
Cons: A little complex when installing, but comes with all the parts you need for any system configuration. Be careful when picking cases you need a bump out on the left side and at least a Mid size tower to allow for clearance when installed and a cutout for the back of the MB and retainer of the heat...