Summary: I purchased this to replace the OEM hsf that accompanied my wife's Phenom II 1100T. I was tired of the noise. I'm running stock clock speeds, but I wanted quiet cooling. This did exactly what I needed. Note: This had no problem clearing G Skill Ripjaws RAM on a Gigabyte 870A-UD3 mobo.
Summary: I was originally going to use liquid cooling on my CPU, but this thing does just as good of a job for a mere fraction of the cost/hassle.
Pros: My Phenom IIx4 965 idles at 22°C! This thing works like a charm! The fan is extremely quiet, although I doubt I could hear it over the others I have in the case. Installation was only hampered by the shear size of this thing, but nothing too difficult, and totally worth it.
Cons: Hmm... the size? Yep, make sure you have a case big enough to fit this beast.
Pros: Works as described, cools down my CPU much better than the original Intel cooler. The idle is ~50C. Installation was easy on my motherboard, doesn't consume much space, allowing me to put additional memory.