Believe it or not I drive my 911 year round. The factory Dunlop tires performed well in the dry, decently in the rain, but wear very quickly and were quite noisy. I had the Michelins installed on an aftermarket set of forged wheels lighter than stock. Right away the noise level was drastically reduced. Also, I could get the Dunlop tires to break away if I tried, the Michelins stick like glue. Handling confidence is up there with an r compound street/track tire. The sidewalls are stiff, but quite frankly I'd prefer that with low profile tires. The ride isn't busy by any means, but you can feel the stiffness of the tires over larger road imperfections. Knowing that my expensive wheels are protected improves driving confidence rather than a softer ride. I run dedicated winter tires on the stock wheels during the colder months, and while they ride much better the 'grip threshold is much lower as to be expected. Running tires without the Porsche N designation doesn't worry me in this case as I trust the Michelin brand. I have run Michelin tires on other vehicles with equally great results. The price/performance/wear expectancy of these tires made them an easy choice. I haven't driven enough to gauge wear, but the factory rear Dunlops lasted about 18 months and 7,500 miles before needing replacement. While this is understandable given the performance envelope the car is capable of, the noise level alone turned me off to getting another set. The front tires seem to last twice as long, but for a few bucks more I got a whole set of Michelins as opposed to just replacing the factory rear rubber. If the rear tires last 15,000 miles I will definitely be sticking with them.