I haven't, but my daughter dropped her G3 onto a hardwood floor. The glass screen protector shattered, but the screen underneath was perfect.
i have a droid razr m right now, and the glass screen is inside a frame. so if i drop it and it hits the sides it wont get cracked. i had a screen protector on it, one time in a car accident my phone went flying and was given to me a week later after police had done the report, saying that it was evidence to the scene

the screen protector was smessed up, but the glass was in great shape. seeing how the g4 can crack on the first drop, im gonna have to treat it like a baby