Summary: OEM heatsink is a bit weak, I replaced with a Dynatron K666 since I've got a rack mount case setup to use a front to back type cooler.
Pros: Fast CPU, reasonable price, fully support ECC memory. FYI, I have this in a Super Micro 3u server case, with four 92MM fans, two 80MM fans, PSU fan, six SATA drives and it pulls around 100watts according to killawatt while idle in windows with the fans on power savings mode.
Cons: None, would be nice if they would make even more reasonably priced processors for those of using these at home.
Summary: Even with the shady heatsink/fan setup, it simply works.
Pros: It's a Lynnfield processor, four cores and four threads. Runs cool enough with the stock heatsink and fan.
Cons: The Intel stock heatsink and fan. The processor by itself works well under heavy load. If you buy anything that Intel is selling (other than the hexacore processors), get yourself a different heatsink and fan to go on it.