Pros: Excellent fit and easy install. IMHO, best solution for narrow ILM E5 processors in multi-CPU or 1U applications.

Cons: None

Pros: low profile, no exposed fan blades

Cons: none so far

Other Thoughts: I have bought about 24 of these narrow ones, and 20 square ones. I use them in a test lab on motherboards mounted on steel plates - open on top. The CPU's are all rated 80-95 watts TDP. They don't cut my fingers like exposed fan blades would. They are never too loud unless the fan speed is manually cranked way up in the BIOS. Even under full (95W) CPU load they do not strain.

Pros: Very solid, looks to be a good heat sync and fan

Cons: Be very careful when ordering this. I hadn't built my own pc in a long time. so when i ordered this with my LGA2011 Socket Asus Sabertooth i thought it would be fine. but it did not fit. I am sure it would work great otherwise.