Purchased for all season wet use. Very easy break-in with multiple rebalances as tires settled in. Tires hold balancing quite well, however.
Biggest complaint is the poor ride quality- tried various tire pressures from 35PSI to 43PSI (OE spec is 36psi to 49PSI). Went with 35 series instead of 30's but can only surmise it helped any. Wanted the higher load index (100) to hopefully prevent flat spotting- no such luck. Takes a couple miles to warm up. The RE962's were even worse (different size).
The Audi is heavy and powerful (4260lbs; 515hp/500tq) and generally naws thru tires rather quickly, especially on the front. The 275 width on 9.5 wheels doesn't seem to have helped much, if at all, since the circumfrential grooves just get bigger, reducing the foot print. Had Michelin Pilot's (old) that bubbled, so got the B-stones. Immediately noticed the stearing vagueness, but hoped once the tires wore down a bit, steering response would return. No such luck. Alignment is perfect, done at a european race shop.
The dry limit seems a bit low to me, even when setting the car up long as possible to load the tires. Transient response is numb and a bit mushy (even at higher PSI), but are consisently predictable, at least it's safe.
These tires are rated 2nd on TR, but would say it's a d-i-s-t-a-n-t 2nd place. Overall, I should have anted up for the Michelins, or Conti's if I wanted to save. Friend of mine has the same car with the new Michelin Pilot Sports-- loves them.
-----Even called B-stone, but there's no tread warranty and customer service was impersonal with people seemingly flipping pages to figure out the answer. I'm a serious car guy and expect and hope someone on the other end can hold a reasonable technical dialogue and know basic info off the cuff. Think I'd rather deal with the French for serious performance tires. The S-04's are a good choice for someone that has low-ish high performance aspirations. 3rd and last set of B-stones....