here's a tip for those of you who may be slightly unhappy with the results of your installation of these films:
first and foremost, wash your hands!
have some "Scotch" tape handy... the standard transparent stuff. take that and everything else with you into the bathroom and turn on your shower to hot. the steam will help pull much dust out of the air. unfortunately, this will not completely resolve any dust on your person that will fall onto the screen as you're applying the protective film... but to minimize the issue, use the included strips of white tape that comes with the kit to cover your device's screen until the last second before you go to apply the film. BUT, now you'll take strips of the scotch tape and apply it to the adhesive side of the film (the adhesive side of both the tape and film facing each other). tape up the underside except for a narrow strip down the middle... leave it exposed. now lay the taped film upon the glass. the now smaller area of exposed adhesive on the film will allow you to easily readjust the the film to get the alignment just perfect.
once you're properly aligned, press firmly on the area that's exposed, removing any air bubbles. using a firm grip while holding the film to the glass, begin to gently pull the Scotch tape out from between the film and glass without lifting the film upwards... just pull the tape outwards slowly. this will maintain your exact alignment (this is especially important for a high grade film like PowerSupport's due to their very accurate sizing). if there are any bubbles, smooth them out with a squeegee, but be careful if there are any trapped particles so as not to create irreparable pimples in the film.
now, if you discover any trapped particles or need to make adjustments after install, start by tearing off a couple more pieces of Scotch tape, about 2 inches long, and attach one to each end of the screen once your screen protector is installed. these will be used to help lift the screen protector from the glass easily and without damaging the film. it also helps prevent dirt from beneath your fingernails from being stuck to the adhesive surface of the film as you wont need to scrape up a corner of the film.
turn off your iphone on and open a blank Safari page. tear off a few more pieces of Scotch tape and have it ready at the edge of the work surface. look carefully at the screen; with the white screen you'll be able to more easily see any lint trapped under the film. larger dust particles will be easy to spot as they may cause bubbling. now keep in mind that these particles are stuck to the mild adhesive underside of the protective film.
now gently lift up the film using the tape you applied to each end of the device. while holding the film barely off the surface of the glass, take a strip of tape with the sticky side up and place it under any dust particles you saw, between the film and glass. now press down on the dust particle, letting go of the film. now hold the film to the glass and pull the end of the inverted strip of tape.
et voila! the dust and lint should be stuck to the tape. repeat this procedure until satisfied, being extra careful while removing the tape you used to lift the film off the surface to prevent creasing the film. this is the best way i know of to get a completely dust-free installation without having to locate a sealed, dust-free facility.