First off, it has to be mentioned that the tire sits fat, my 255 rears sit over the wheel in comparison to my runflats that didnt.
Second, these tires do make a little bit of noise between 25-35, its not deafening, and I might just be sensitive to it, but I swear its there, even though my passengers dont hear it.
Now that they only 2 negatives are out of the way, I can be honest, they are fantastic tires. A long run through Bear mountain on an open diff modified 335i, and these tires performed incredibly. They did understeer twice, but both times they came back very linearly, the same can be said when they oversteered. Compared to the runflats however, these event occurred at much higher levels of grip, and the warnings where much greater. And again, unlike the runflats, grip was lost and regained very quickly and without a snap.
I will say this, the side walls, even though these do sit fat, dont move around or squish like Continentals DW, they simply sit through and grip. They also prove a great turn in response. Having said that, I also think the ride is comfortable for this type of tire, but it is a little rougher than DWs or Pilots, but light years ahead of the runflats.
Its tires like these, that make me unsure why bmw fitted runflats, in every conceivable way, theses are vastly superior tires.
Overall, I think I found my new favorite nontrack tire. I will update when I get them on the track because i am very interested to see how they perform.