When the film came, at first I thought, "There are indeed two then left." But far from it. The first film launched. At first I was quite pleased - perfect - but then I discovered two small air bubbles. So as described stand out - but that did not work, the film adhered to the Etrex and refused to be tempted with duct tape to to break away from the device. So use of the fingernail - film went off. The attached dust remover attempts to clean the foil and glass devices now. That was the absolute fiasco. After repeated lifting then the first film was finally over. Ok, the first slide is to practice. So put number two. Equipment surface cleaned. Checked backlight on dust. Carefully placed the film. Again, at first satisfied. But here three small vesicles were detected this time. Once again, all subsequent purification experiments resulted in the destruction of the film. I have been several smartphones, including 5 incher can provide dust and free of bubbles with a protective film completely. For the really small screen Etrex me is with 2 of these films failed. Somehow the whole thing was not satisfactory. Since I work in a company (not for chucks) are manufactured in the chips, I have here the opportunity to coming into a totally dust free area and ensure with extensive technical effort and specialized clothing. In one of the smaller laboratories I have retired this Saturday, armed with the Etrex and the last remaining sheet. Conclusion: I have succeeded here, absolutely raise the sheet of dust and bubbles. However, I hope now that the film is just as tough as it looks and feels. Because every time to go to a lab to apply the film, is not an option. Even in the bathroom turned out to be the very difficult. Otherwise, the product makes a good impression, how it behaves on the bike in difficult light, remains to be seen. I might write another comment. But the assembly is so tricky, I did not expect. That was my point deduction - everyone can judge whether that is so relevant, but handling is for me also to itself.