splash Masque Clear Screen Protector for iPhone 4 4G  4S AT&T and Verizon (3-Pack + 2 Bonus Back Films)
This is my first screen protector so I can't compare it to anything.  However, I will note that bubbles have begun to form on both mine and my wife's phones a few months after what seemed to be a good clean application.  The bubbles are around the edge of the phone so it's possible that this is where the edge of our phone cases are rubbing the screen protector. While disappointed with what they look like now, the price really was a steal.