The product consists of a protective glass, a wet cloth, and a dry cloth for preparing the screen surface. The packaging is in a book style and the instructions are detailed in digital form via a QR code from the internet. A positive aspect is that there are stickers that hold the glass in alignment with the screen (edges and camera hole), so when we see that it is correct, we remove the protective film and press the glass on the screen, then remove the film from the top side that has the stickers. It did not leave any trapped air bubbles, but we will need a card to press the glass. I do not know about durability yet. Note that the glass is smaller by about 1 millimeter on each side of the screen, so 4 stars.