For the attachment you have to work very carefully, but in spite of one-time re-stripping of the cover (was slightly crooked) sits there now bombig. Two downside: 1. The oleophobic treatment does not provide a grease-free surface. 2. When using an additional cover, eg Otterbox specifically for outdoor activities, "weaves" the keyboard when typing. Letters, characters, etc. are "written" in spite of the tapping-off often repeatedly. Of course, this also applies to "shift", etc. This makes the handling of "out there" rather annoying. Unlike a cheap film I remove the glass protection that works great in everyday life, of course, not the outdoor use.
