At the first touch of the flip case you notice immediately that there is no Billigkram. The leather makes a very valued and properly processed impression. The Z1 is sitting in the Case really good tight and you have to tidy firmly press an upper corner to the rear, so that the cell phone falls from. In my previous case (Billigkram) on Nexus 4, this was not the case and the Nexus had permanent epilepsy.
All in all, I can say with a clear conscience that the case is worth the money. It not only protects the sensitive display of the Z1 (also here again is the screen protector from the same manufacturer is recommended), but can also free all controls, so you can still use the phone well.