In the first few weeks I was still happy with the shell. However, this is totally scratched. After 3 months of normal use can be seen on the back of thousands of scratches. On top of that the envelope much dust to pass through because you do not perfectly seated. This means that I am now but small scratches on the iPhone have but the shell was dauerhauft drum.
So I've now decided to dispose of the shell and to try a different model.