Summary: Bought this 5 years ago and still running strong.
Pros: Keeps my CPU cool at 4.2 GHz. (4.4 GHz still cool, but I can't get it stable with voltages I'm comfortable with.) Doesn't have space issues with RAM close to CPU like a normal heatsink. Easier to maintain than custom water cooling. Looks very nice in an Antec 1200 case.
Cons: The mounting brackets are terrible. Very flimsy and barely able to secure as well as it needs to. I know the H80i brackets are much better, shame that wasn't out when I built my system. With using both push and pull fans it is hard to fit alongside a side mounted fan. Had to cut unneeded plastic ...
Pros: Put some high power fans on this and you will be surprised. I have gotten better temps than a friend with an h100 and stock fans. My 3770k has been at 4.6 for a long time now, and the highest I've hit ever was about 75C when not in an extremely hot area.
Summary: I've been building my own custom computers for over 15 yrs. I've always used a 100% air cooled system up until now. With recent high end cpu clock speeds in the 4ghz range air coolers have gotten ridiculously large and hard to work around.
Summary: Ok, I'll admit I made a mistake! I bought this without any fans and ended up using my case fans to push air through it. Surprisingly, the temp of my cpu drop 50 degrees. It rarely goes about 119. Mother board is now staying around 109.
Summary: I bought the H70 (with no fans, I used my own) off of Newegg with a $20 rebate, and it was a very good purchase in my opinion, although I didn't really see a good improvement until After I added a second fan.
Summary: Grabbed this in addition to a bracket from triptcc's website and was able to mod my GTX 580 in one afternoon. My temps were previously hitting 99+ degrees C under 100% load and this dropped the temps down to 60C max, with idles in the 30s. Much much improved.