A test on my Tablet revealed that she was not working. Mystore 365 recommended to try the keyboard on a PC. There, a data entry was possible.
Well I ordered a couple of adapter to see whether the keyboard with the other tablets works for me. Then it would be possible to try the bag there. For returning me the effort appears to be too high.
Let's see how it goes then.
Update 26/11/2013 With another pad it works.
However, it has been found that the pad can somehow sideways fall out of the bag when you do not pay attention to it. It is missing on the sides a limitation / locking.