COOLER MASTER Hyper 212 EVO RR-212E-20PK-R2 Continuous Direct Contact 120mm Sleeve CPU Cooler Compatible with latest Intel 2011/1366/1155 and AMD FM1/FM2/AM3+

Pros: This thing keeps my i5-3570k (@ 4.4GHz) running at average of 60 degrees! I have two corsair SP120s hooked up to it with my fan controller and I never need to go over 50% power while gaming. I also like the way it looks in my case.

Cons: No cons but see other thoughts.

Other Thoughts: I suggest you lay everything out and really plan out the installation. I had to re-try twice because I tried rushing through it without double checking things. Mostly the retention screws weren't in the middle slot for all of them and I tried fixing it while it was through the heatsink. xD Cooler Master looks out though because they give you a nice supply of thermal compound in case you have to reset it. This is definitely 100% MY fault because I was rushing through it so think of me as impatient.

5/5 would buy again!

Pros: -Still an excellent cooler.
-Fan is still going strong with no issues.
-Still keeps my i5-2500k runnin cool at 4.5Ghz.

Cons: -None for the price.

Other Thoughts: Lots of people deducting eggs for their own mistakes, this cooler deserves 5stars all the way around at it's price..
This isn't the biggest air cooler out there, wouldn't surprise me if people were trying to install this on their moms HP computer. :D

Pros: 25c idle temps in a $20 case. What more can you ask for? My computer now doubles as a freezer. Super quiet too. It clears my memory just fine, I was worried at first.

Cons: Installation was nerve racking. Screwing down the screws for the retention bracket takes a bit of courage. Felt like it was too much pressure on the CPU/motherboard. It's worth watching a video of someone installing it just to make sure you get the idea of how to install it. Instructions could have explained things in a bit more detail.

Other Thoughts: $25 after rebate for one of the best air coolers? That's a steal.

Pros: - Managed to make it fit in my case/over my ram (it arrived the day after said case, which arrived the day after I assembled everything else. Bonus random points to newegg/UPS for spacing my build nicely :p)
- dropped cpu temps by ~5 degrees C @ idle
- having installed a spare thermaltake 120mm fan I had laying around for push/pull, dropped the temp in the rest of my case by ~15 degrees C @ idle

Cons: If you are not using a full tower (or bigger/randomly designed with *******huge cpu coolers in mind), DO NOT buy this. Also, If you are unwilling to verify that your PWNerrific ram will fit, please don't cry that it doesn't.
... Because it won't. And don't even bother trying to put shorter ram in after you install this.
Unless you want to take it back out, of course.

Other Thoughts: Wise man once say: Do your research before you build, odds are better of you not buying things that don't fit together.

My Build:

AMD FX-8350 Vishera 4.0GHz (4.2GHz Turbo)
ASUS SABERTOOTH 990FX/GEN3 R2.0
2 x EVGA GeForce GTX 670 FTW+ 4GB
G.SKILL Sniper Series 32GB DDR3 1866
PC Power & Cooling Silencer Mk III Series 1200W Modular Power Supply
COOLER MASTER Hyper 212 EVO
Rosewill THOR V2-White Edition
Windows 7 Ultimate x64
Fedora/Ubuntu Live Sessions when I feel like it ;)
2 x ASUS VE247H 23.6" LED

Future adds:
SSD
Maybe watercooling if/when I get bored and decide to OC

Pros: Lowered temperatures on my Core i5-3570k by about 5C at idle and 20C under Prime95. As a bonus, it's also quieter than Intel's stock fan when under load.

Cons: This thing is a pain to install. Took me almost a half hour.

Pros: -Keeps Cpu perfectly cool
-Cpu never overheats
-Great Value
-Quiet

Cons: -It is big so make sure there is room in your case

Other Thoughts: This probably wont keep an i7 3770k or higher end cpu's cool especially when overclocking, but for an i3 or an i5 it is perfect

Pros: Inexpensive, works ok, quiet, had a big rebate

Cons: Very tall - barely fit in case, attachment method works, but needlessly complicated compared to the old lever-latch method, instructions for AMD install poor.

Other Thoughts: Wife's cooler died - figured to give her my old Arctic Pro64 - 92mm and get a new one. My AMD Phenom II X6 with 10% overclock now idles at 27C instead of 28C - 100% load dropped from 41C to 40C - hardly worth it, but the 120mm fan is slightly quieter. This fan wouldn't have fit in her case anyway.

Pros: idle temps on FX6200 went from 32C down to 22C. New version has side by side heat pipes, no gaps. Comes with everything you need to get up and running. Lots of instructions in different languages.

Cons: Some folks may be turned off by the easiness to move the cooler around even after mounting screws fully tightened.

Other Thoughts: Works like a charm. Idle temps went from 30 c down to 22 c. Added Push Pull configuration, which was made easy by the extra mounts that came with the cooler. Vertical mounting allows for direct exhaust out the top.
AMD FX6200
ASUS GTX660 OC
CORSAIR 8gb
ThermalTake 500 Watt
4 RoseWill 120mm fans,

Pros: Keeps my processor around 32c idle, 55 while gaming, which is great. I don't overclock or anything so I haven't pushed anything but like what temps I'm getting

Cons: Instructions could be a bit better. I really didn't care for the installation of this, but it doesn't lose an egg because I feel it's a sturdy setup.

Pros: I overclocked my amd phenom 955 black edtion too 3.8ghz on idle i get in the 30's for degrees and gaming in the 40's

Cons: none so far

Other Thoughts: will recommend to all thats interested in buying it