I always had trouble with display sheets with dust or bubbles, I have assembled this film under running water. Is indeed the Defy thanks to the waterproof no problem and I got it really completely dust and bubble free mounted.
Unfortunately, the film is not precisely as stated but ringsrum about 0.5mm too small. Since I do not have unfortunately exactly centered, right now I have no edge, but left about 1mm. Bothers me personally not, but is a bit annoying. Since it involves only the cutting, optimization at this point would certainly be possible.