After many tests with protective films of all kinds, I launched LOL in the glass. This screen can not be fixed easily. For my part, I had trouble has no dust on my iPhone4. Once that was done, I Carefully set up the glass cover. It is enough to "let go" and then we see adhesion forward ... to the edges, it's magic. No pressure to perform, I did not even touch the squeegee. It is very thick, so I decided to stick it embossed button provides (one white and one black). I do not have the necessary perspective to assess the product, I will see in a few weeks. But level arises: NO PROBLEM
