Application can be a little tricky. Zagg's site recommends you first apply the back cover, as your mistakes will be less noticeable on the rear, instead of the screen. However, be warned that the back cover is much harder to apply. The front is pretty straightforward, though the film is slightly shorter than the full length of the screen. However, the back film has curved corners and a couple of holes (around the rear vent and camera). These holes can be stretched if you pull too hard on the film or use too little application fluid. You should be fine as long as you're gentle, use lots of fluid (especially on your fingers) and leave the film to set overnight.
The complicated installation is a bit annoying, but you do get a tough and high-quality shield for your trouble :)