The movies themselves are very good: perfectly transparent, silky touch is like the naked screen ... Once well set apart from the cutouts around the speaker and sensor above the screen, they are invisible.
They are not harder or easier to lay than another. Like all the films that arise "dry" (without understanding the application of a lotion beforehand as some) be patient and extremely cautious about its environment.
Choose a potentially little dusty room (prefer the office with wooden floors in the bedroom with carpet ...), clean, surnettoyez and renettoyez your screen to remove all traces of fat (I do this with wipes for glasses), then gently wipe the screen with the antistatic cleaning cloth provided to erase the traces of the cleaning and possibly transfer the dust (dry until there is really nothing!).
When your screen is perfectly clear, gently take your film without making too sudden movement (while air movement may raise dust should be avoided), and apply it as explained on the pack. There you go!
Easier to say it? It took three tries before the perfect result, so wasted two films. Hence the interest of having 6.
Attention to the fit. The film is precisely cut to the dimensions of the Q10, it really touches all edges, so any shift and that's it, the film is not bonded well because it extends beyond the edges of the glass or comes to meet the bar aluminum above the keyboard.
Otherwise? No complaints, and I still have 2 films rab in case.