The application of the film is not a problem with the conventional approach. The display should be very carefully and lint-free cleaning (with the supplied cleaning cloth no problem), if possible do not touch after peeling the adhesive protective film this silicone adhesive layer and then as accurately as possible before the final application to create (a subsequent detachment and To avoid re-adjusting). Hang for application to one side, beginning and towards the other side, the air emphasize (supplied plastic card helpful), smaller air bubbles can be personalized with moderate pressure and still work out.
If something does not fit (too large bubbles, excessive edge or overhang on one side), then the protective film can easily be removed again (there again if possible do not touch the adhesive layer) and all begins again. The more often, however, a correction trial takes place, the greater the likelihood that dust from accumulating on the adhesive layer or that the adhesiveness decreases the margin.
If all goes well, is the high quality of the film "visible", which also justifies the higher compared to similar price for me.