This comment goes for anyone in this thread. If you need to replace your first set of Michelin MXM4's, go to a Michelin approved dealer like Discount Tire or another store and they can prorate the discount on the tire warranty. My Michelin cross climate new set was $513 out the door and I got a 60% discount on replacing them at 17k miles. Those tires would have cost $1100+ without the warranty. The only major stipulation is that you need to repalce with new Michelin tires. I saw a mention on cross climate's above, and they are better on traction and weather than the MXM4's, but they do seem to be less efficient on that front. I did a 4077 mile road trip on them over the Christmas holidays and overall had no issues, but my average was 315 wh/m for my entire trip. I did not have any issues with noise on mine. They seem about equal on that front, just some surfaces are louder than others.