The shell has an almost too good fit. Can be relatively good but invest remove relatively heavy again. Not necessarily suitable when the casing is to be removed frequently and. When removing I have always solved the SD card cover with and this has then jammed in the envelope. My main problem is that the envelope front side pressed to the screen protector and this replaces. The film used by me but is applied very precisely centered on the display and but goes very far to the outside. Thus, this is unfortunately for me a knock-out criterion. Too bad because the shell is very slim and fits very well with the Z1.