This is a great idea, it's just implemented poorly.
The item has a hard plastic inside that's supposed to fit the phone exacly. It's attached to a folding padded leather case. The case has a magnetic snap, that doesn't really snap tight. It's a bit odd, but it works well. The only caveat is that you have to make sure it's been placed properly. On the other hand, it doesn't really matter if it's latched--it's not going to fall out or anything if you don't.
The plastic part is a real problem. My first experience with it was that it was just a bit too tight around the phone--so tight, that if one side's plastic was right up against the screen, the other side was a few millimeters away. When I saw that, I decided to try to reinsert the phone. I pulled it out, and tried putting it in opposite to how I had before. However, this left the few millimeters hanging on the other side instead.
When I tried to re-seat it a third time, I found I could no longer get it out of the plastic. It was so hard to try to remove it this time, that I decided if I continued to try, I might just end up breaking it, so I stopped trying.
On the side of the phone that has the volume control and camera button there's a long, thin strip of plastic to make it so the volume control can be used. I find this to be cumbersome at best. The volume control is pretty difficult to use when the phone is seated in the plastic holder.
The top of the plastic holder is cut away for the on/off button and the earphone Buchse. That doesn't make a lot of sense if you want to listen to music with the device in your pocket or whatever. If the Tasche is closed, the fold wouldn't allow the earphone plug to be used.
It's also difficult to hunt for the on/off button. It's not altogether easy to "feel" for it in the dark, or whatever.
My final gripe. The hard plastic holder has already broken (within weeks). It seems it was too tight, and the thin part over the volume button broke through. In addition, I'm not sure how it happened, but another piece of the hard plastic literally broke off around the bottom of the holder. This means I paid for something that was so easy to break, that it's already kaputt.
All in all, I liked the original concept of the thing. I would improve it to make the plastic more pliable and flexible and not so rigid and hard. I would also find a better way to encase the phone, so that all the buttons were easily accesible to the TOUCH.
Finally, I would make it so the fold-over Tasche part was easy to lock backwards, so that one could use the phone without always having a fold-over part either up behind the ear or down in front of the mouth (as in the case of the latch tab). Fold-over might not work with a phone of this kind, but if it does, it'll have to be easy to get out of the way for normal phone operations.