Shell OK, only small weaknesses.

The shell thickens the iPhone on only slightly and fits very good overall.
It is soft and custom-fit, so that the phone can be used with little effort in the shell.
All buttons can be after that operate well.
Two little things bother:
1.The advertised air cushion effect for the corners I can not nachvollziehen.Das phone fits snugly into the corners.
2.On half height, the shell has a circumferential slightly disturbing "seams" that is probably manufacture.
This seam is not pleasant to the touch; functionally it does not matter.