Pros: You can't get any more silent of cooling than this without going to a water cooler, at this size. @66mm high it fit into the VERY tight space I had between the new PSU and the CPU. - Amazingly silent - Cooling efficiency is VERY impressive even with only using the smaller lower fan only AND with using the low noise filter cable too). HIGHLY Recommended if need to quiet down your PC. I was blown away at the performance of this thing. It looks like a Car radiator laying on its side atop a V6 engine and its works extremely well!!! I had a hard time finding a good cooler at 66mm high and this fit the bill PERFECTLY!!!!!

Cons: Not really any bit CON's here. If I had to list something though it would be that it is not designed for overclocked systems (and says so in the box though), but I'd guess with both fans installed (and assuming it was installed correctly onto the CPU with the included thermal grease), it would probably do okay on a minimal to medium speed overclock too - in this regard its not really a CON though)

Overall Review: Bought this for my daughters PC, which was annoyingly very loud using the stock AMD cooler on her AMD AM2+ 6000+ Black Edition CPU. System currently uses an ASUS GeForce 9600 GT graphics card & previously had an ANTEC 380W (EarthWatts) PSU. WinXP-32bit Pro, WD7200 HDD, DVD, FDD & Add-in 5 channel Audio Board. Upgraded the PSU to a 450W ThermalTak fixed the occasional slowdowns in Diablo III and Skyrim and reduced sound level from fans about 20-30%, but after installing the Noctua NH-L12 (with only the lower fan & the line noise filter cable), its virtually silent. Even with my ear up next to the case!!