Back:
The back is, apart from the camera incl. Flash, completely covered and therefore protected against scratches. The slight transparency the Sony logo is still recognizable.
Display:
The display is not impaired by the shell. It surrounds the edges of the phone, and ends at the exact spot where the almost unseeable screen protectors of Z1 begins. The notification light stays free.
Connections:
Accessible remain the USB port, the magnetic adapter, headphone jack, speaker, On / Off button and the holes for the lanyard.
Cloudy, but operated are the volume keys and the camera button.
Inaccessible SIM and SD card.
The shell pleases me very well, but I give only 4 stars because they deburred not very good and the fit is not 100% in my case. It is all good, except in the field of USB port and the top left near the headphone jack. at these locations you realize yet easy game.