The function of the shell is relatively good. She does what she is if you understand once they set up properly. (A ausfühliche instructions there is unfortunately not) Apps are set by going to the "+" and then quickly releases the lid. Then you can select the app.
So now for the bad part of the shell. It is only adhered to the back of the phone. This bond holds now only relatively poorly after only 3 months. Mir is the mobile phone during use mittlwerweile once simply slipped out of the envelope. After cleaning the back and re-sticking it has been resolved and won 2 more times.
One more thing. In conjunction with a special adapter from Sony Ladestaion for magnetic charging station is provided so that the envelope can still remain drum. The store with the Hüller proves tinker game .. I need the device umpteen times back and forth to slide it under some pressure finally "docks".
My conclusion: Nice idea, somehow functional, but super bad run. I would not buy it again.