After a few weeks but the big disappointment: I have the iPad with the cover always in my photo backpack in the laptop compartment. Unfortunately, the magnet of the cover holding but not very strong, so that it dissolves again and has some high-mount for the iPad (the White Stripes) badly scratched the screen. I have then the device again looked at in more detail in a retail store, apparently there is a large dispersion in manufacturing quality, in some this bar is flat, with some even deeper, unfortunately exalted at my stop. The customer service from Logitech has not even responded to my complaint so far.
I use the part therefore now only over keyboard, no more than cover.
I can therefore only advise every buyer to check immediately after delivery, as this strip is processed at his unit.