Is there a question in there?

I love my pro4 endurance tires. I would never ride anything else. I know I won't flat and they ride good. I only flat when the tire has had enough, usually about 4000 miles (2000 miles on front, 2000 miles on rear) and they tend to slow flat (aka I go to ride the next day and its flat in the garage). Once I flat I know it's done and I put the front on the rear and a new one on the front.