Display better protect different!

I think as a rule generally not much of protectors, as I always careful with my equipment Bypass and am rarely plagued by Kartzer on display. But with the 3DS is different:
Thank the problem will be known, the vertical stripes on the top screen of the 3DS are after opening, because this apparently rests on the frame of the lower screen when folded. One can normally wise with a microfiber cloth to clean these strips again, but in time to sneak there also an ugly scratches. That's why I bought this screen protector to avoid scratches more.
When installing natural skill is in demand and I make the films not responsible for ensuring that I am apparently untallentiert it. The bottom film is not a problem. When the top sheet I have several attempts needed because due to the size performs only small angular deviation at anstetzen on the other side to the great shift. For a dust and bubble free application but the first attempt must succeed. Once I have the first of the top films then abandoned, hats with the second then halfway folded (all bubbles around the edges I still do not get away).
The big moment of disappointment for me was the when I turned on the 3DS: it shows a darkened, grainy image and the 3D effect was weakened. Surely I have seen under sunlight the picture than before, but I am doing here in the first place to protect the display. And among these image limitations Seeking I prefer a different variant.

Pro:
- 4 sheets (2 for upper, 2 lower for dispaly)
- Price is ok
- Antireflection works ...

Cons:
- ... But with a darker compromise, granular and restricted the 3D effect image reproduction
- Attach not easy
- Unattractive design by foreseeable margins

My tip to protect the upper display without membrane: When you close a place microfibre cloth between the two screens and continue to fully enjoy playing.