Very good product - a few pointers

The shell (transparent) makes a very good impression. Only the "peel" is a bit difficult and I worry how the behave when they have been brought up a few times off and on (only necessary for SIM / SD card or battery change or possibly for cleaning; see below) - for the star deduction.

The notches are good and should be sufficiently large for most headphone and charger connector.
For the 3 buttons (volume up / down / power) no gaps exist but these are also covered and the knobs are modeled on the cover.
That's okay, though, the pressure point is therefore slightly schlecheter than without covering.
Maybe I'll cut out the "Cover Switch" and then use the phone buttons in the resulting recesses directly -'m not sure yet.

To say there is that the dark gray of the device with the shell appear lighter, which I find very pleasant. One sees, however, the gray smartphone every fluff between casing and mobile phone. Since the shell can not help, but you should both carefully dust free before fitting.

The shell is good, except for the front top and bottom (before / to the headphone jack / to the micro USB connector) - here the envelope is now minimal. But that does not interfere with and is complaining to Hohm level.
Rear / on the sides of the shell is very good at.
Therefore, I have no expectation that lost more fluff between casing and mobile phone, but I can not judge (often have the phone in your pocket).
The risk of further fluff lets me but (so) feel when cutting out the keys.

The shell is very handy. One sees dirt (grease, etc.) quickly and clearly they can just as well by wiping clean (behavior similar to the mobile glass).

Also possible: You can choose between casing and mobile phone picture einkelmmen so you can "personalize" the phone without a mobile phone or envelope to spot (if the image does not rub off).