Summary: You can't even tell this is running and I've had it for over a year already. I do have the current speed maxed out and have not been able to get my PC to over heat even with OCing to 5.2GHz (on a 2700k) Very simple to use and install. Highly recommended!
Summary: Like most I had to tone down the voltage using the diode trick to prevent the rattling noise. Other than that this cooler performs well and keeps the Core i7 CPU nice and cool. I've see the updated version of this cooler as well and I can attest that the newer revision doesn't have the rattling issue.
Summary: I love this as it keeps my CPU super cool in my 600D case. No issues with mounting, no issues with leaks. Would recommend this to anyone. The only thing that might be a bit of a letdown is the price.
Summary: I have Corsair memory, power supply and CPU water cooler. It is quiet and works as advertised, awesome for overclocking. I used to be very critical of water cooling because of possible leaks, but you know things can happen, water cooling is the way to go if you are a PC enthusiast.You are probably afraid of installation or messing up so was I, but it is really easy to install.
Summary: The Corsair H100 kept my CPU idling at around 30 C and around 40 C while gaming on my i7-3770K. Great temps, but after just 17 months, the pump is failing. Thankfully it has a two year warranty.
Summary: I would try and get too extreme with this... but mine was quiet until the pump started caveating. When these are quiet, they are great for almost any new processor. Used mine on a i7 920 slightly OC'ed to 3.2 24/7 for about a year. Moved to a Swiftech H220. Temps are about 5-10 degrees cooler depending on this Florida ambient air temp.
Summary: Lots of coolers can keep a CPU in its recommended operating range. Want to overclock? Well then you will need some extra cooling power and the H100 delivers. Added bonus is that it is very quiet to boot.