I've had the tires for two years , 37k miles. Things I noticed immediately after mounting is the road noise (thought I had a bearing going) and gas mileage dropped 12-15%. Nov 2015, 2 years and 37k later, things have not changed and the tires look worn.
These are the worst winter tires I have ever had. They aren't any better than a good all season radial. We had the original Xice on 2 previous vehicles. The Xice2 is terrible in snow and slush and not that great on packed snow or ice. I would not recommend them to anyone. I plan to run the Xice2 this summer to wear them out and replace them with BF Goodrich next winter.
I have Pirelli P4's on 2 cars, namely a 2008 Toyota Camry and 2006 Chevy Malibu for 3 years. Both cars lasted no more than 40K miles and far short of the 85K, I would have rated the treadwear at 0/5, the lowest I could go was 1/5. They're good dry, wet, and comfort. There is a slight whistle at higher speeds. Due to the Treadwear, I did not even consider Pirelli again, went with the Michelin Defenders where I am getting good wear on a 2003 Buick LeSabre. Also with snow traction, handling with the 2008 Toyota Camry with the lighter I4 engine was terrible in snow, but still much better than the original Firestones that came with the car. Everybody in my house is easy on tires, treadwear and snow are major issues.