Actually it is pretty good.. I have that baby a-top my 1333 T-Bird and it seems to keep it pretty cool!
it looks to me as it's the same as a T-Bird ~1000 HSF with possibly a higher CFM fan, cause it's not as big as my friends' 1333 Stock retail HSF but it works just as good if not better...
Coolermaster is a great company, they are exceptional value. my cooler was like 15 bucks canadian!