I put these on my car last January to replace a set of factory defective Conti's. Did so based on the reviews and that they were only like $93/ea. I noticed right away my car handled better, and the shake was gone (bad Conti's). I didn't notice any difference in noise or fuel economy. Cornering was a little better. I rated the tires on all level at an 8-9 minus winter conditions. Last winter seemed ok, better than the COnti's but after putting some use on tires now they are not a very good winter tire, they provide limited stopping and accelerating traction, and less than average side to side stability. The other half of the year is awesome though, great traction on dry and wet, never had an issue with hydroplaning.
As far as treadwear, the dealer marked one tire at 8/32, 2 of them at 7 and one at 6. if accurate on the 6/32, I would expect about 42k of usable life, if accurate on the 7/32 I would expect 57k, on a 55k tire for a spirited driver, I would say acceptable.