I can understand the ecstatic reviews here on this Bagatell articles not understand quite. It fits, it was delivered quickly, okay. But: It scratched breathtakingly fast and also does not sit on so that no crumbs (for example tobacco.) Can reach between device and envelope. My wife has a three times more expensive silicone sleeve for your Z1, which was six months older and still looks like new. This here, however ... but well everything has its price ...