Not the best but not the worst either shell ...

Now the shell itself.
Positive on the envelope is:
+ Projecting edge the display thus better protection when lying down on the display
+ Easy installation (phone sits really well in the shell and goes easy in)
+ The "grip points" at each of the sides slipping the phone is not always back and forth, giving a secure grip
+ Holes in the casing for valve and the camera are cut cleanly

Negative on the envelope is:
- The pressure point for the unlock button and the camera button is much more difficult
- With the shell, the phone can, of course, not in the docking station
Screen shots (key combination) are impossible to make (my biggest gripe endlessly annoying)
-By The time course collects dirt on the back and if this will not scratch away this also like the back of the smartphone (which is not very hard is the Z1 with mineral glass back: /)

Conclusion:
I would not buy this Case, since it personally that you can make me the envelope no screenshots too annoying.