Here, unfortunately, cheap bad

The seller has delivered quickly and smoothly, everything was great.
But the supplied article is weak and it refers my vote.
6 films were delivered without any notice or manufacturer sticker.
Aufklebeanleitung was, but you know already. Have stayed in several smartphones and digital cameras protective film applied, successfully!
This film is unfortunately bad, unwatchable!
She is so tight or expands when sticking that it survives and up and down the side that must not be.
I then cut on two sides, the second film. The mini bubbles did not go away even after one day.
Third film applied, almost without errors, but suddenly two days later form new dents and bubbles!
In addition, the surface is very dull, what I find disturbing.
Even at the fourth attempt the same result, then it is no longer cheap and the products also no longer recommended!