The product is easy to install. I had already used my Sony Xperia Arc Ericsonn for 1 month, the screen had therefore suffered some snags along the edges. On these snags, the film does not stick very well. My first film was taken off after 3 days. I have since added a holster () which blocks the edges and prevents delamination. One year that the film is in place, and he has not moved since.