First, the delivered sheets did not fit. This one has already seen the mere laying. Therefore, I have (had to make pictures and write emails) the films complained. Almost too much effort for a ~ 2 items. Oh well. The new films then fit almost perfectly. I was satisfied. But after about 2 weeks use I noticed a stain. He was not on the film (I thought at least) because I do not wegbekam him with a damp cloth. I was already thinking that it might be a bubble, even though I had applied the foil without bubbles. And just when surfing the Internet, I suddenly understood where this spot was. From scrolling! When I handed the phone operator I scroll with my right thumb in the lower third of the mobile phone. Right there is the ugly stain. That is not by 3 weeks after Fleck has formed by the frequent brushing over it with your thumb up. What the film should withstand (key, etc.) holds when they do not even stand my own skin. I wonder if the producers ever had their product before selling in their hands let alone tested ..