Pros: Easily Installed, Great Dimensions, Quality quiet fans, GREAT performance
Cons: Fins could be tighter, not much improvements from fan upgrades
I had absolutely no trouble installing the cooler. Could probably have figured it out without instructions its pretty straight forward. The mount itself is a great design. Although the fan mounts seem fairly flimsy they install/uninstall pretty easily and seem to hold up well. I had to use a screwdriver to install the middle fan as the top clearance is very small, and this was much easier then I expected. You will want to measure your case thoroughly, also check here for posts about which cases fit (this will not apply to new D-series as its bigger):
Performance wise its been a trooper. I got the older NON-PWM fans but was still able to get solid stable at 4.7ghz on a FX-8350. It ran a little hot though so I backed it off a click for 24/7 use. Have not tested with ULNA adapters will post results when I do. Very decent though, as my motherboard (ga-990fxa-ud5 rev1.1) tends to run a little hotter then most. Would probably stable 4.7 easily with a fan upgrade. Although I have heard many have not seen much improvement from fan upgrades (although it probably would make 4.7 cool enough for 24/7)
***UPDATE*** After the thermal paste had some time to settle it seems my temps have improved. With some decent ambients may be able to push 4.7-4.8 without any upgrades. 4.6 stays cool:
The fans themselves are of great quality. Nothing too special as far as performance-wise but they are still good quality fans that i expect to last for years (will post if/when they die). Being non-pwm I may upgrade them someday but really see no reason to I think my build is great with this cooler at these clocks works great. If i do they will still become case fans .
Overall theres really nothing bad to be said about the cooler. Gives great performance, Great ram clearance (able to clear my ram better then a hyper 212), Great mounting system that spreads paste evenly easily, Great support and I dont care what anyone says GO NOCTUA BROWN! The colors not perfect but really would look decent with a sabertooth build. Also it looks burgandy through my red window
Didn't give a full stress test, what I did was I dropped my cpu down to 4.5ghz became completely stable (without ULNA). Then I attached ULNA adapters and used heavy gaming and convertxtodvd to make sure my normal use didnt cause high temps. I already know its 100% stable so no reason to use p95 or IBT because all I did was change fan speed. Max temp was reached with convertxtodvd at 62.4 degrees after 15 minutes it peeked and hovered around 60. I plan to stay at this setting as my computer is now SILENT. 9 fans and you wouldn't even know it. Love this cooler, LOVE the ULNA adapters they give you another way to push the OC limit while being silent. normally with slow fans I would proabably have only got to 4.3-4.4ghz but because I could test high speed and set low I was able to push further while being STABLE.