I purchased these tires for my xB based on several factors, the 2 most important being the excellent reviews for being quiet, and the next, having an 80k mile treadwear warranty. I noticed on other reviews that several people seem to be wearing them out rapidly tho :(
The tires have a nice, assymetrical tread, the rain grooves are wide, contributing to excellent handling in the wet. They do indeed give a very quiet ride. The rubber is soft compared to other tires I've used, so the mileage issues might be real. Overall ride is excellent. A friend installed them for me and he commented that they were very true and took hardly any wheel weights which tells me they have excellent manufacturing tolerances.
My vehicle is light and doesn't have the best of suspension so I'm very pleased so far at how well these tires perform. I'll update my review as I rack up some real mileage :)