Now I have the tried by atFoliX and I'm thrilled.
I'll make it short:
1) A very easy to understand guide that contains many tricks as applying the films without dust and bubbles. And I succeeded.
2) The sheets are a perfect fit. So much so that I had to throw one, since I was half a millimeter too much room on the touch screen at the beginning. But that was a simple application error. I had the film simply must push to the edge of the touchscreen. But atFoliX are yes THREE films per screen, so that was no problem. The high accuracy of fit you do not see that at all slides sit on it!
3) A vacuum-welded microfiber cloth and a squeegee for fitting the foil is attached. But the doctor, I have not needed because the carrier film is so tight that the films have clung perfectly without bubbles!
4) The 3D effect of the 3DS NOT be affected. Not a trace of ghosting / double vision to recognize - even with change of perspective! But please note that the films are very clear and cause reflections. But the alternative is a matte film that completely destroys the 3D effect. Here I simply turn the screen brightness higher and have my peace.
5) The sheets feel after applying very valuable to. Even when operating the touch screen with your fingernail I have yet to cause any scratches. How will behave in the long run show. But I'm in good spirits.
6) No impairment of the touch screen. Even if I run the stylus only gently across the screen, this is optimally recognized!
I'm very satisfied! But why only four stars?
Very easily:
atFoliX puts the package in a dust remover. The part is in principle a kind Poster Strip - so a tape can be removed with the targeted remaining dust particles. At least in theory. In practice, this part of SO stuck fast that it left adhesive residue and I spent the next 15 minutes in order to clean the screen again. In that case, I recommend more likely to use a high quality, residue-free adhesive tape.