This is our new mainsail, designed, built, and delivered to us in Mexico by Dave Benjamin of Island Planet Sails. My biggest concern ordering this new sail was that it wouldn't solve any of the poor sailing experiences I was attributing to our old mainsail, that my lack of knowledge about sail trim was the real culprit. So I was very pleased when we sailed with this for the first time and realized a HUGE improvement. We have about 1,500 miles on this sail so far and it is doing well.