I would return the film prefer and demand my money, because when we had less than two minutes on the screen. First, I really got all the tips from the reviews followed and went into the bathroom, was waiting until the dust had settled and then wiped dry my screen to install again waited and then tried the film. I say tried. The first time it worked quite well. Using your fingers I could almost push out any bubble and it looked really good. BUT I have the film on a laptop screen used is nunmal not completely uniform, so I think the margins are not as in a tablet or phone (This is incidentally stuck in the enclosed "Description" to the film), even back rest of the screen , That's why I had to from about three quarters of the film pulling it back, because it was on it a little bit wrong, and thus and thus not quite to contend for the margin was. Yes on a tray that's easy, because it does not matter too much if the film is minimal wrong thing anyway always the case, who brings something because even the first time Perfect? Anyway, then dust particles have accumulated on the film and from there went nothing more. Bubbles no longer went out, I felt like in Biounterricht, if one is to make a preparation for microscope and wants to avoid water bubbles. At some point I (of course) demolished the film and unnerved the trash paid überantwortet.10 euros for nothing and again nothing. I would love to return the part, but that is not, unfortunately, -, - For the laptop I never try something to give it back, not with adhesive films. I rather live with the mirrored display. For my tray I recently ordered another film, but with a different (cheaper) suppliers and hope because the instructions are accurate, perhaps even with the text, instead it works better with images and ... A star's from me but for the quick delivery. Since I can not complain.