All I can say after 2000 miles is that these re970as are more comfortable, handle better, and provide more steering feel than re960as, which were already pretty good in those regards. The re970as handle triple digit highway speeds easily. They have more than adequate grip for all but track use, and their steering feel yields only to max performance summer rubber. They're a perfect tire for the G37 if you need some all weather capability--they may not give you the nth degree of grip and responsiveness like a max performance summer tire, but they are at least usable through extreme cold and light snow. The dilemma now is, do I purchase a separate set of snow tires for deep snow/ice. Based on the performance of the 960as in snow, I would say if you only have to worry about light snow no more than a few times a year, get these and call it good. If you get more than 6 inches regularly and cant afford to stay home, dedicated winters are always a lifesaver for winter use.