I've only had these tires now for a couple months. So I only have a couple thousand kms on them, but so far I love them. Great tire for the money. If you don't want to fork out big bucks for the Pirelli or Michelin (like me), then these are great. I can't comment on the tread wear yet, since they are basically new, but in terms of quality and road noise, they are awesome. I would buy these again.
I haven't had much of a chance to really put these tires to the test for handling because it's now winter and I don't drive this car much in winter. But I can tell you that compared to the run flat tires, these Continentals have a beautiful ride and are so much quieter than the Potenzas. They are on of the very few performance tires available in an all season in this tire size. I have 265/30R19 on the rear and 245/35R19 on the front, one size up from the standard 255 and 225 wall. Can't wait for spring to heat them up!
Too early to tell about snow or wear. Most other aspects of these tires are fantastic. They have a little less traction for cornering and off the line launches but all around far better than the stock noisy hard Bridgestones.