honestly imo unless you're super picky all screen protectors are pretty similar.
the installation is VERY important. I tried zagg, ghost armor, skinomi, all kinds of brands that I installed myself and none were very good.
Now...I just go to the ghost armor stand at the mall and they install it and it always comes out flawless. For my surface pro the people at the microsoft store installed the screen protector that they sell at the store (apparently it gets horrible reviews online) and it's also flawless.
Installation is VERY important, more so than the "quality" of the piece of "film".
At the end of the day a screen protector is a screen protector, sure some are better than others but probably not by much.