I just put my second set of Michelin Pilot A/S Plus tires on my Y34. I ran my last set from 93,570 to 146,700 and still had about 5/32 of tread left in them, which speaks volumes about the tread life (53,000 miles is pretty good for an Ultra High Performance Tire). My experience with traction has been great, except in the worst ice conditions. I had them in Colorado over a 7 month period, took it up to the slopes during that time, and had it as an every-day driver in Colorado springs throughout the winter and only once was the icing so bad that I couldn't drive. I will say, for whatever reason, my tires "whined" a little bit for the first 1000-2000 miles, but they quieted down after that. I'm not sure what the deal is with that, but I'm experiencing the same thing on this new set that I jut purchased. I will say that I've begun to run my tires at 34psi rather than the recommended 33. I found that my tires wore a little unevenly on the outsides and had more tread on the inside. Not sure if this is a tire issue, a weight issue or what. I had the alignment checked twice during the time those tires were on and have never had it adjusted because its always been dead on. In order to cut down on the noise in the cabin, I put insulation behind and under the rear seat. This helped to minimize the high-pitched whine. I recommend using the $18 stuff from home depot that they use for duct insulation (
http://www.homedepot.com/h_d1/N-5yc1v/R ... ogId=10053)
I did read A LOT about what other tires people put on their Ms before I purchased the Michelins again, but after the cost analysis, determined the best route was the Pilots. Consumer Reports rates them very well, just below two other tires (one being the Hankook V12 Ventus and I think the other being the PZero Nero), but they are very expensive. In the end though, at least for me, the tread life is double what most of the other tires were, so by the time the Michelins wore out, I would have been through two and a half sets of the other tires (at least thats my theory...)
Anyway, all this to say, I've heard nothing but good things about the DWS, but in the end, its all compromises it seems. I would love to try the DWS's, but I feel like with as much driving as I do, I'd be changing tires once a year!