Product is neither the figure nor my expectations

Note for quick reader: In contrast to the product photos which show a modern, magnetic adhesive cover, the cover supplied me is executed with push button on the back.
Bottom: Update from 23.12.2014

In Detail:
The shipment was carried out reliably - the goods arrived quickly and unharmed.

When unpacking followed by the (negative) surprise: obviously the cover must be closed with a push button, which is located on the back of the cover.
Before you can mount the cover, you have to say the Smartphone via NFC contact that the future carries the cover. After the NFC Contact an app is downloaded and installed from the Play Store, which reacts with closed cover on the built-in lid magnet and an operation performed on the plastic little window adapts.

After installing the software, the cover is glued to the back of the compact Z3 - the corresponding adhesive film is already in the cover. To fix a protective film to be deducted and the smartphone is congruent to stick to the cover.
Is that success happens, you can start using it.

Experiences:
First negative point: the smartphone is - whether open or closed - diagonally on the table and then wobbles if necessary depending on the current pressure point back and forth. For clarity, I have two photos you shot.
Second negative point: after a shutdown and restart of the phone has forgotten that it carries a Smart Cover. The screen adaptation with cover closed does not currently work with me anymore.
Third negative point: the Plastikfensterchen smeared on the front. I manage only at very high pressure on the plastic part to initiate interactions on the screen. Chill to the one possible way not using so. On the other hand: why operating elements are then adjusted me some apps on the small window ...?!
Summary: Very disappointing for me.

Updated on 23/12/2014
Meanwhile the product image from Amazon is updated. Previously lacking a photo of the back, on the one could recognize the pushbutton clearly ... precisely this pushbutton turns out in practice at various points as a hindrance: from wobbling on the table, I've already written. I also have to take in two of three cases, two hands to close the cover - the closure works only when the pushbutton is pressed almost exactly on its abutment. And to close the shutter noiselessly did not succeed - yes, I have therefore already disturbed in other classical concert. ; (

I'll return the cover today. Before that I must still inquire how I actually nondestructive abkriege the cover of my phone - after all, it's glued ...