I got about 7,000 miles out of a set of Pilot Roads on my F800ST. Seemed good to me so I went with the PR2 next.
Great handling tire and I couldn't wear the damn things out. I had 19,000 (!) miles on them when I finally changed them out. They still hadn't gotten down to the wear bars but I was getting ready for a long trip and didn't know how much farther they could go. I replaced them with (what else?) another set of PR2s.
The great thing about these tires is they keep their round profile even when they get close to wear bars. Good predictable handling for the entire life of the tire.