Summary: I bought this cooler back in 2010 to cool an I7 920. I just replaced the fan because it started making noise. Now the V8 cools a six core W3690 Xeon overclocked to 4.15ghz with a max temperature of 40 degrees celcius. Couldn't be happier.
Pros: It's absolutely huge, and worth it. Kept my CPU cool, even after overclocking it. Very quiet, even on the highest setting, and cheap vs. water cooling. That, and it looks awesome showing it off.
Cons: It's huge. I know I put it in the Pros, but it is large. Almost didn't fit in my case I got with it (which was my fault), so be careful when purchasing this fan. Other than that, nothing else wrong with it.
Summary: I've just inherited one of these from a friend who swore it was the biggest piece of dung he'd ever owned. The fan had died on him and he was going to throw the whole thing out. I installed a new fan and then an expansion fan and put this monster in a spare computer for testing.
Pros: Good airflow and room to expand and install more than the one stock fan.
Cons: Bulky and more than a little bit of a pain to install.