I've only had these tires for a week, but wow what a difference! I got this car with the OE Michelin Pilot HX MXM4 and was shocked by it's poor performance. With traction control on in the rain, it was normal to have the car hesitate as the rear tires fought for traction. With TC turned off, well, it was a wild ride indeed. Lots of fun but very dangerous for the inexperienced. Snap oversteer ruled the day. In the dry the Michelins were a little better but still very overwhelmed by the Northstar's torque. I've been itching to try a good set of Extreme Performance or Max Performance tires on this car since I got it but waited until the Michelins were used up. I can say that these DWs have transformed the car. It's rained several times in the past week so I've had several opportunities to try out the wet traction. Where normally with TC off (that's how I drive) I would get severe oversteer with normal throttle application (meaning no aggression whatsoever) on turns with very slick asphault, these Contis just bite like crazy. I have to get very aggressive to induce some slip, and when I let off, they come back into line beautifully.
On the highway, at speeds approaching 70 - 80 mph, there is a little vibration in the steering wheel, especially as the tire comes up to temp. They are noticably more noisy than the Michelins but that's to be expected. Ride comfort is good but the stiffer sidewalls are definitely felt. Not a bad thing in my opinion but conservative buyers should be aware. I read a recent review from a Jetta owner giving these tires a bad review stating that turn-in is poor and that he can feel the sidewalls squirming and the only thing I can think of is that his width is way off compared to his wheel width. There is no reason why the experience he describes would happen with properly matched tire widths.
I'll update later as I get more miles on these tires but so far so great!