This is already the fourth mumbi sleeve that I use for mobile phones. The Case for Sony Xperia Z3 is designed precisely and functional. The mobile phone is easy to insert in the envelope. It lies with shell better in the hand than without. All openings are accurate across the terminals, slots, buttons, LED and lens. The charger plug can be easily introduced into the socket and firmly seated, without wobbling. Since the shell is about 2 mm on the screen, it does not touch the surface when you put it on a table or cabinet with the display page for example. This prevents scratches on the display. Minor accidents on the edges are cushioned from the shell and prevent damage to the phone. Nevertheless, when handling the phone due diligence should be noted, because against a blow on the screen does not protect the envelope. All in all a more convenient and effective protection for less money.