I drive a 2005 Mercedes C55 AMG Kleemann S7 (over 450rwhq) - This by far, bar none is the best tire I have ever owned. The grip that this provides over other tires I have had on the car is biblical in comparison. Either on the autocross track (gritty surface to blacktop), this tire grips. I guess the best explination would be highlighted when I am on the bleeding edge of grip around a turn...at the point that most tires would break loose, these tires just hold on. I cant tell you how many times I have thought to myself, man, how the -------- did those tires grip like that...
As impressive as they are on a nice summer dry day, they are equally impressive in the rain. If you have a car with traction problems (yes you cobra's, vettes, merc's) ...higher TQ cars ... these are the tires for you. 10+ ...if this was the bar, nothing would ever be up to standard.

Simply superb best tires I have ever used!!!!!!!!