Let me start with this: I've had a Moto Droid and two Moto Razr Maxxes, never once used a screen protector on any of them, and never once had so much as a single scratch or blemish on any of their Gorilla Glass. That being said, I got an Otterbox Defender for my S5, and I love it - except for the built-in screen protector. After 24 hours there's already dust underneath it, the air voids seem to be growing, and it collects finger smudges like nobody's business. I'm about ready to take an X-acto knife to it and get back to naked glass. Anyone here have experience doing the same?