Installed this item on a Core i5 2500k and have been using it for some time now. After monitoring it's temps after several hours of Prime95 and other programs, I am very satisfied with this item. i purchased this for 36 dollars, at that price point it is one of the best heatsinks I have heard of. Consistently gets great reviews from professional sites, which is the main reason I bought it. Temps for my system was around 25-30celsius idle and 45-54c avg on full load with Arctic Silver 5 TIM. Temps were taken from program core temp v1.0.
Cooler is very light, has excellent mounting system for socket 1155, isn't too tall, and is pretty darn quiet.