I ran these on my 2011 1M yesterday at the autocross. I found them imprecise with poor tunr-in, but very balanced and grippy. They also add a tremendous amount of stability to the car, inspiring lots of confidence in high speed sweepers, which is something the 1M can use. Much better than the Dunlop Sport Maxx Race which I've also run, faster than streetable track tires with similar wear such as the RS-3. Quite different in behavior than most other tires such as the R888, pluses and minuses. More thoughts here:
http://www.1addicts.com/forums/showp...0&postcount=24