Field experience:
I have the "sticker" glued to the back of my iPad. It was easy to stick and glue kept perfect. From removing this one can not argue that lasted a bit longer, and could only be reached with difficulty, but there was no matter residues on the iPad. Even if the elastic pulls "pocket", it's pretty much impossible to tear away the sticker. This part holds bombproof, therefore I see this rather positive.
For testing I put 10 cards in credit card format in the pocket, which worked without any problems, if I had had more, would this also determines yet fit to do so. The bag is very elastic and does not crack.
Conclusion and evaluation:
I think, unfortunately, no meaningful benefit for this product, in this review I am not referring to the usefulness therefore, this is an open question.
Who can benefit from this product and has always wanted a bag that attach themselves to the phone or tablet let, will be delighted, in this case, I can only express a recommendation to buy, the price is in my opinion reasonable.