The approximately 1 mm "edge" is not quite as nice but does not really bother.
It's only for the simple removal of the film because, although one usually does not have to make.
Unless you want the Nintendo DSi XL does not reflect so because playing is in strong light really hard because he's not anti-reflective coating to 100%.
Otherwise, there is actually an aspect of why you should buy another slide.
2 Plus points from me:
+ The films are crystal clear, you do not notice that they are there.
+ The film is super smooth, thus the pin slides particularly well on the Touchsceen (which I liked best about the film)
That with the bubbles, I can totally confirm. They disappear after a few days. But Vosicht you should make sure that no dust on the screen is, because otherwise arise bubbles which, I believe, no longer disappear.
Therefore, I would buy the films already the DSi XL and then apply immediately.
My Conclusion:
The film is just great!
It is not as expensive and is keeping its promises!
The only night part is that they are not anti-reflective would only what the DSi XL very important
(But it is indeed FX Clear and not FX antireflection)
Basically, I would advise everyone to buy.