UPDATE:
Unfortunately, I must now tell of the same wear and tear, like others here. The mobile phone has been worn at the edges through the shell and also the points on the inside of the casing have been on the phone back as baked. Very unpleasant and can not be removed. This is obviously not the intention. Nevertheless, my phone is still alive thanks to this shell despite several falls, hence the 2 stars. Crash proof it is so.
Photos of them are set.