To the original question: No. It shouldn't hinder the FPS. I don't recommend using one either, because it doesn't truly add protection beyond scratch resistance. Because of how it adheres to the screen (effectively becoming part of the screen), it won't provide additional protection from screen cracking. A glass or plastic screen protector directs the force of the drop or blow away from the screen by breaking. Kind of like how race cars are designed to come apart in a crash to direct the energy of the crash away from the driver.