Have to concur on the power support film-it is great.
HOWEVER, it can be extremely challenging to get on! I think they give you 2 per pack because you are almost CERTAINLY going to wreck the first one.
Make sure there is NO DUST (and I mean not even a grain) on your screen or you will pull your hair out trying to get the bubbles out of it. AND-you can't anyway-the more you touch the underside of this film the worse it is. So save headache, make sure your screen is spotless, and TAKE YOUR TIME so you do not have to realign the film. Make sure it lines up the FIRST TIME, or, you guessed it, you may have a dust problem if you have to lift it and reset it.