From my experience, the film has two small weaknesses:
1. The film is too big for my feeling a touch, so that they stood with me at two _gegenüberliegenden_ corners and not properly rested. But since this is not in the reading area of the display, but on the black border, does not impair the function, but possibly interfere only visually.
2. When using a pen with rubber tip, which are suitable for such capacitive displays, built on the film a distinct squeaking. It's annoying, so the film is not suitable in my opinion, if such pins are to be used.
Conclusion:
Despite these weaknesses, in my view an excellent product that optimally fulfills its essential function. The matte screen is much more pleasant for me to use for a long time, for example if you ebooks, etc. wants to read.