The installation is not difficult, just need to go gently (but clear explanations in English).
It feels no loss of tactile pressure, or screen brightness.
The protection is very fine, it does not pass completely unnoticed but almost.
The touch is very pleasant and even better than that of a replacement screen that I had the opportunity to try.
It is therefore an excellent product which I highly recommend, although I have so far not been able to test its real strength when dropped or shock!