I did everything according to the instructions, and have installed these on devices before. I have since taken mine off, and sent it back for a refund for the following reasons:
1) Screen was almost unreadable in sunlight, even with the backlight turned all the way up.
2) The "Orange Peel" effect looks awful and took away from the gorgeous front of this phone.
3) My touchscreen felt like it lost some of its sensitivity, found myself having to hold down on a part of the screen for longer than before installation in order to register the command/character I wanted.
Just my experience, I know some people love theirs...wish I were one of those peeps.
$0.02 FWIW