It is a complete mystery to me how I could get it wrong. But I have the page marked "Front" launched peeking upwards and the "back" side of the screen. Of course it had to end in disaster. Since the first screen guard was already down the drain because you have to put the "back" side up and the "front" side down. For me a bit confusing (and also with my family pushed the easy to questioning and puzzled faces), but we still had a second attempt. What für'n luck. Since then it has also worked as desired. I can apply the whole thing relatively free of air bubbles, the last air bubbles could be simply removed and as far as I'm happy with the result. I can scratch resistance has not yet say much, but I hope it lives up to the manufacturer promises - with me is always quite a lot of sand and dirt in the bags.
Actually, I would have nothing to complain about, except for the very fact that it is easy to switch the pages. Either must be mentioned or should be generally concerned about the concept of "front / back, front / rear" make on the rather good instructions again. So before you plan puts the whole thing in one go, rather test if it really are the right sides. Otherwise satisfied and therefore even the 3 stars.