Addendum to review: The seller has included in my review contact me and sent me a new copy. It seemed to be very concerned, pointing out that this was an isolated incident. I have given the whole thing a chance. This time I stayed at home as a precaution. Again began the adhesive mats to slip!
I looked at the device in more detail. The slippage will certainly be because the vise bends easily when you screwed him. Terminals he does rather then inside, ie from the open side away, so do not on the whole area. This one has only the inner region a friction surface, not on the entire surface of the jaws.
If you now with the opening clamps the vise small upward, and an iPad2 ranhängt, so the adhesive mats are laterally displaced by the considerable leverage, pressed in my case up, as they rub on the whole surface. I think when the sheet of the vice would be slightly thicker, there would be no bending and the whole structure would hold.
Otherwise, the device is built quite stable and I can imagine that it works better in other use.
