Accession to the screen via a silicone layer is a remarkable technology: it is repositioned effortlessly and fills micro-scratches (which then become invisible).
I had a big scratch, it is significantly attenuated: Remarkable!
Its dimensions are adjusted to the size of the screen, so you have to perfectly center the filter during installation.
Obviously, it requires an environment free of dust and minimal care for a perfect result (this is true for any protective film).
The cloth provided is velvet, not chamois, it will therefore leave some dust on the screen but it's nothing compared to a piece of paper towel!
Banish dust before laying with a blower, or by using the protective film filter pasting on screen to remove them.
If dust still slip under the filter, it is easy to remove with a scotch after lifting the filter using another taped up stuck in a corner.
If you truly be missed, there are 5 other filters in the package ...
If there are air bubbles, plastic blade is provided for hunt
The filter is perforated at the sensors and front camera lens.
After installation, the wrong finger slides on the screen = must be cleaned with special filter LCD liquid.
Do not hesitate, it's good stuff ...