The shell is really thin and therefore hardly noticeable when worn. The display is thus not protected, because there survives no edge. But I did not really matter because I have it glued a protection glass.
In addition, the casing looks quite good (I think), but got within a few days a lot of scrapes and scratches. That does not bother me, but this is due to a conscious. Now, after a few weeks, one would think, the envelope would be very old.