This is my third pair of natives. My first broke after 2 years and I am in the process of getting them warrantied. So far so good. The rubber ear pieces on my first pair of XP's fell off after a while and one of the hinges broke. I never had problems with lens scratching. I have no complaints just now for the Dash XP's. All glasses will fall apart if you are as hard on them as I am. I figure if I can get a year out of them, I got my money's worth. I think they could be a little more tougher for the money.