They are rated 4th on Tire Rack "best in category" at 98%. Not bad. We typically buy our tires straight from Schomp. They have great pricing and in the past they have participated in pass deals with Steamboat. This season I purchased my winter Pirelli's from Discount Tire. They beat Schomp by $200 installed and out the door. We have no complaints with our Pirelli's and can tell you that they stop very well, have great traction in the snow and ice, and reasonably ok on warm dry pavement.
I called Schomp, they were the same price on the Pirelli, $20 more annually on storage vs. BMW of Denver Downtown and didn't offer free alignment like Downtown did with a purchase of 4 new tires.