I've had Conti DWSs (205/225) on my car since I bought it - so that has been 4 years and 50k miles. I don't know how many miles were on the tires when I bought it, but I had put another 30k on them when a belt slipped on one, so I replaced all of them. Unfortunately for me, I had 20k on that set before I picked up an un-repairable nail puncture and found out that my MB dealer (even though they charged me more!) doesn't offer road hazard . . .
. . . that set did have plenty of miles left on them.
Just to get out of that loop, I bought another complete set at Goodyear for about $725 - mounted, balances, road hazard and taxes . . . . Although the jury is still out a little about quality due to the belt slip, I expect to get 50k out of them +/-.
I can't quite understand the desire to get such little extra performance out of a tire at the risk of being stuck somewhere due to weather conditions - or forced to risk my and/or the car's safety for that little bit extra performance that I'll hardly ever use. Since it has snowed even in the deep south (Georgia, N.Florida, etc.) I feel it is best to get all seasons regardless. (Just buy better ones if you want, but the DWSs are surprisingly highly rated.)
You never know when you might have to drive north sometime, or just be caught out at the wrong time . . . . I was driving toward Cincinnati once in my Probe and got caught in a blizzard/ice/slush storm. (Took 5 hours to go the last 50 odd miles due to the traffice being brought to a stand-still.) I remember a guy in a Crossfire who literally
slid down the highway's banking in a corner with his wheels spinning away. Obviously part of that was due to RWD. With the Probe's FWD, I just put it in low and motored on! (Not Conti's but all seasons on the Probe; and the ruts in the slush were several inches deep.)
Now if you are going to autocross or something, OK, buy a special set and then just swap them out. Why risk the whole car on a sudden heavy rain or a little snowfall to have the option of another .05g of cornering? (Frankly, we're in the wrong car if we really want to have a road racer without more serious modifications than the tire choice.)
My $.02 worth. The DWS seem to be pretty good tires if their carcasses will last as long as their tread will. And the tread pattern certainly looks a bit different.