these screen protectors meet functionally regarded their purpose - they seem to protect the display reliably. However, one can expect at this price included services as a removal aid for the film from the backing, and a small cleaning cloth - that was there even at cheaper films.
In addition, even if not directly attributable to the product, was the settlement by the Market Place Dealer "Eltrato" more than annoying; the delivery has circa. lasted one week and the shipping costs for the 2x double set twice charged 1.40 each and both were delivered only after a week in a 58-cent envelope.
In summary, I advise against this offer.
Greetings!