I have owned a Wintec AP for more than 8 years. There is basically no wear to the material and has an amazingly comfortable seat. I recently sold my gorgeous but very uncomfortable stubben VSD so that I could buy a Wintec 500 Dressage saddle with CAIR and exchangeable gullets.
I just purchased my new Wintec dressage saddle and haven't tried it out yet, but it's used and shows NO signs of wear. I wonder how my horses will react to the CAIR and am eager to see whether there are positive or negative changes in their behavior under saddle.
Good luck in your saddle search!
Save a cow, go synthetic! :)