Summary: It works, but even with the rebate it doesn't seem like the best bang for the buck available. Mid 30s idle, mid 60s under load with a 4.2 GHz overclock on my i5 2500k. The manual sucks. Very difficult to install if you haven't installed a CPU cooler before. It's a decent cooler if you get a good rebate, but I'd go with the Hyper 212+ for a value cooler or a Frio for a more pricey one.