I'm really happy with the NT-01s. I don't think you will get much better grip unless you go to a Hoosier slick. The Nitto's are excellent for grip and progressive break away on the track, however one negative is they whine loudly like a gear drive so would not recommend for the road.

I only use these rims for tracking and so far this set have done only four track days (4 x 20 minute sessions each time). I driver very hard and they have shown minimal wear so far. I need camber adjustment to get the most out of them though!