I just installed one last night in my system, ordered from sidewinder.com. I originally ordered one from NewEgg but that arrived with a broken fan (!!) and I returned it for repair, they were out of stock so they gave me a full refund and I looked around for other sources.

Anyway, my CPU is now 5-8 degrees cooler than it was with the stock AMD cooler, and this cooler itself is certainly quiet. But as you can see from the photos in this review, it blows straight onto the power supply and as a result, my power supply fan is now spinning faster (and louder) than it was before. This is for a 3000+ Winchester on an Asus A8V mobo mounted inside an Antec Sonata case. There's also 4 hard drives mounted, and I have a second 120mm fan mounted inside as well. My ambient room temp is 18.3C, LM sensors reports 27C M/B and 31C CPU at idle. The cooler is running at default speed, LM sensors reports 2343RPM. The rear case fan is at 1205RPM and the front case fan is 1140RPM.

The orientation is pretty unfortunate, too bad they couldn't have come up with a mounting orientation that blows to the rear of the case instead of up or down, then it would be exhausting heat toward my rear case fan (which is obviously not working very hard) and leave the poor power supply alone.