I have had these tires on my Miata for about 500 miles, so I can't give mileage estimates but I can give an opinion on the tire in everyday use. Very stiff sidewall for good turn in, but will give a rougher ride. It will give different sounds when cornering left and right due to the tread pattern. Standing water will make it hydroplane, but okay on damp roads. Good cornering, but since I just got all the release compound off, I think, I haven't had a chance to run at the limit so I can't tell about breakaway characteristics. At the auto-x, local people are saying it is the next best thing to a race tire.
Respectfully,
Andy Hohl