Like other manufacturers, their newer heatsinks had some copper in it. Like other manufacturers, they added high speed, high performance fans. Unfortunately, like other manufacturers, they were noisy. Although I think most overclockers don't mind the noise created by 7000rpm fans, I think most consumers do.

I managed a 1.4@1.6GHz overclock, and the temps stayed pretty steady at about 50C. The goal of this cooler was to provide good performance at low noise. You just have to take my word for it, but compared to every fan I've tested, this was by far the quietest setup. I'm sure there are quieter, but probably not as good a performer.