I give 'em an A- in the 1st time I've driven these tires on track at a school (dry track) in 225/40-18 + 295/30-18 and this car. I've ridden as an instructor with 150 students, and in another 20+ instructor cars, and driven NSX/635turbo/vette/studentcars etc etc on track for 20 years. Yes, I understand there are better tires out there, and of course there are better drivers..... but these tires seem to be a great compromise of quiet and comfortable on the street, and an absolute joy on track. Yes, a little slippery on track this first time which is no surprise since they were new and the tread was deep, and the rubber appears to be hard relative to other tires I've run since the melted rubber that builds up on the inside corner of the tread blocks on many tires does not appear on these tires...surprised me (mebbe this will happen on a hot track day? This was a cold track day). But they stick fine (slippery to me may be fine for others...), they are very responsive and predictable at and beyond the limits of adhesion within reasonable slip angles (I did no large slip angle drifting with them), and they gave me a nice quite comfortable ride home on concrete jointed freeways. No, they don't stick as well as track tires, but who cares. They stick very well when it's wet, they work just fine on the street and I'm pushy on the street, and at this price, I can wear them out in 5-8k miles with no regrets. It'll be interesting to see how long they last.... Unkie sez try 'em.