Super concept, but can not tolerate frequent slimming

This case is much cheaper and functionally better than the 5x more expensive Ozaki sleeve that I for iPad 3's had and basically not processed much worse. Unfortunately, at a corner, the holder after a few weeks already torn: While they still works and keeps well on iPad, but regular demountable does not seem to tolerate. I still have a keyboard cover, depending on the purpose I change which must be able to withstand cases.
The Aufstellhülle Forefront is for the price in spite of this defect but totally OK, they would buy again.