I've used mine for 3 weeks. There is some black coating wearing off on the pointed corners, near the stdby and headphone jack. It looks like they painted/coated the clear air jacket. You can see thru the plastic where the coat is coming off. Its not that bad yet, but I emailed PS cust service to see what they consider normal wear and tear. Only put in pants pocket, no other items to bump into.
Like I said, its not to bad yet, the back area is completely solid still. But those pointed corners are losing coating.
On the other hand, the clear Air Jacket is doing good after 3 weeks as well. Just some few scratches at the back which are hardly noticeable against the white iPhone. Sometimes dust may come in but thanks for the stickers I could easily remove the case and wipe them off. Constant use in the pocket - pull back and fort, and placed on the desk.