Pros: -Keeps 6600K under 60ºC at 4.2GHz
-Silent

Cons: Push/pull fan setup is a bit bulky. Included fans are ugly.

Other Thoughts: For most overclockers this will be plenty of cooling. If you dont overclock, your CPU will probably never even get warm.

Pros: -Lightweight
-No problems cooling 3770K at 4.5Ghz 1.2v
-Construction seems solid
-Cooling is good enough that the unit runs quietly during gaming and normal multitasking.
-Refurb unit appears to be NIB, no signs of prior use
-Price and case compatibility compared to any of the big air coolers
-

Cons: -Very loud at full fan speed, but you'll likely have to run a burn in test to get it there
-Installation is somewhat difficult

Other Thoughts: Would definitely recommend this. The price and performance are both fantastic.

Pros: I will be giving this a 5 egg rating because it has so far performed well and I don’t have the clicking or bubble noise that other people have spoken about.

Cons: I have a MSI A88XI (Refurbed) Mini-Itx Mobo with a AMD A10 7850K (New) and it works. The AMD A10’s has a very annoying way of reading temps (they call it “Thermal Margin”), They have a thermal range on the sensors for the processor so I get temps without overclocking in the 70c to 80c range that’s with the water cooler correctly placed and high end thermal paste (Tuniq TX-4), so I will be going by the motherboard temps according to the sensors on the MSI A88XI the temps read at 28c to 34c without overclocking (3.8 ghz) it will stay at this range no matter what I do. When I overclocked to 4.2ghz it went up to 50c and was stable. I used HWMonitor 1.28 from CPUID com and this free program works very well for my win 8.1 build.

Other Thoughts: Ambient room Temp 21.6667c (71f) to 25.5556c (78f) and it’s a 95watt processor. For testing and over clocking it’s important to know this, for your particular processor you will have to look it up.
Refurbed this all in one water cooler is worth it for the price point. I have always been very lucky with newegg’s refurbed items.

Pros: this really moves alot of air and keeps the cpu cool. For the price it is a MUST have for any computer guy or gal.

Cons: The instructions are a bit lackluster, and this is a BIG unit. but other than that no complaints!

Other Thoughts: a warning to users with older towers should be placed on these items. People will want to know that their towers cannot support this item and that they will need to upgrade their cases to allow it to fit.