The Conti DWS is a great tire for my car for a cold weather tire. I run these tires starting in November and typically through the end of March.
Dry traction is strong if a little squiggy at the limit on the sidewall during hard cornering, the tire is just a tad slow to take a set for how low a profile it is, once there it is very predictable and traction predictable with little or no heat in the tire.
Rain this tire is awesome and instills a high level of confidence regardless of the amount of rain on the road. Great cornering traction, and solid braking in the wet too. An easy tire to drive quickly in the wet, and be very confident with. I have a friend with a 2003 M5 that uses these tires for his wet weather tires during track days and loves them.
Snow is easy with these tires and the Audi's AWD. Very confidence inspiring, awesome traction levels, and very little spinning up of the tires, unless I take the traction control off for adhesion exploration', and even then you have to work hard to get the tire out of shape in fresh snow. Packed/compact snow this tire is very capable, easy to feel good about, and communicates well where you are at within the tires limits which are very high. I personally feel this is not a big step down from a studless snow tire, barely a half step really, and for the occasional snow we see in Seattle a perfect tire for my needs.