With over 1/2 million Michelin miles I had one set that did not last as long as they should have. They gave me back about 50% of what I paid so I am NOT complaining. What other manufacturer would have done the same???
BTW I have NEVER had a set of Michelins crack as they are supposedly known to do. Even the rear tires on my VW PU went 150K with near 3/16" tread left.
I have had 2 sets of Michelin tires develop some small cracks in the tread area...but vegas is hard on tires..