Spent a long time researching for the best performing tire that still can be driven in most conditions short of snow, and these are the set that kept coming up as ideal street performance tires. Recently put a set of 4 MPSS on my stock 2007 Z06 Corvette (285/35/18 front and 345/30/19 rear, set to 30psi front and rear) and am totally floored by the performance improvement. The forward traction improvement is excellent, but the lateral traction... It's hard even to describe the difference short of experiencing it for yourself. There is so much grip you can just DIVE into any turn and know its going to stick. I'm not sure you can even get the rear end loose without driving the car with extreme disregard for its limits. It is finally able to put down the power and control the rest of the car is so well designed for. Most critics rave about the performance aspects for the price of the z06, but if these tires had come stock, it would have been an even more impressive response. Tramlining? totally gone with PSS. Getting squirrely requiring lots of driver adjustments at full throttle through the first three gears? Never with PSS. Spinning the tires 1st and 2nd? Almost no spin in 1st, 2nd is a dead hook at any speed. The tires settle down the entire car and make it quieter, smoother ride, with better performance, braking, and IMO improved safety. I havent run them in the rain yet but from other reviews they will be better than stocks at least. Not enough miles for any appreciable wear, but if they drive at 65-70mph in moderate rain and last the 30000 mi front/15000 mi rear treadwear warranty (especially if they maintain similar traction) I'm convinced they are the best balanced summer tire ever made without compromising any noticeable dry performance on the street. There is a reason they put these on the Ferrari 599 GTO (ferrari's fastest road car ever). If you are making 350+ HP there is no reason not to put these on your sports car for 3 season driving.