I got this cooler based on a recommendation from somebody on an enthusiast forum.
When I got the part I was shocked at how big and heavy it was. Definitely a lot of metal in there for cooling!!
I am using this with an Intel i7 875k processor still at the stock 2.93GHz. I ran some tests on it to see how stable my system was after building and I ran all four cores at full 100% power using Prime95 software and was never able to get the CPU temp above 50C.
The only potential problem with this heatsink is that it can overhang the memory modules on the motherboard depending on the exact layout of your board. If you have some of the new highend RAM modules with large heat spreaders on them you may end up with an interference fit. I lucked out on mine, but that's the only issue I could possibly find with this thing.