I'm surprised at what everyone is saying. I was very doubtful at the Greenstuff performace after getting some fronts that wore really quickly in 1 day at a track event. That made me try some 1144's but for some reason they did not survive another afternoon at the track. (After comparing temperatures which the pads could withstand on the BAT site and the Mintex site - I understood why. The BAT site was...let's just say over optimistic). When I went back to greenstuff, they survived and in my opinion did better than the 1144's. I run with Powerslots but I can't see them making any difference compared to stock or other rotors. I have never experienced warping. For the temps. I would be getting out on the track, I would have thought I would have developed warping there rather than on the street....who knows, maybe I'm just lucky. So why are other's warping?