I use that cooler. I think it's great! The installation is really, <b>really</b> simple. You don't have to worry about crushing the core because those springs help protect against that. And, they put just the right amount of pressure. It was worth the 45 bucks I paid for it.
As of now, I'm running a T-Bird 850, at stock speed (100FSB) and 1.75v. My idle temps are steady at 38.2°C with two 80mm high speed Sunon case fans running (front intake and rear exhaust). My temperature measurements are taken using a Compunurse thermistor taped to the outside of the heatsink. Ambient at 22°C (taken using that same Compunurse just removing it from the CPU and hanging it somewhere in the air until it stabilizes - not more than 2 minutes).
But, if this hasn't conviced you, just check out other reviews, such as this one from <A HREF="http://www.mikhailtech.com/articles/cooling/mc370/" target="_new">Mikhailtech.com</A>.
Anyways, if you still go for another cooler after all of this, I think purchasing a copper shim will ease the paranoia of a cracked core. (I haven't done this myself, just so you know.)
Hope this helps!
<i>OC...unless your computer's cheezy (is that a good rhyme?)</i>