For me this envelope was a big surprise indeed. After the market for the OPO is already thin and I had done a little research I decided for this envelope. A decision that I absolutely do not regret that feel is absolutely good, the fit is also very good. Another advantage is the easy protruding lip that protects the screen. Furthermore, the case is completely closed and all around, thus ensuring protection. The recesses and knobs are made very clean. I am completely satisfied and regret almost only black and not bought the three package to have.