I use the glass screen protector on my iPhone and I really like it. If you think about it this way, a screen protector will protect the original iPhone glass therefore keeping the resale value up high when it comes time to get rid of the iPhone. If you have scratches on your glass because you did not use a screen protector, your phone will not be worth as much when it comes time to selling it unless you're trading it in. If you're one of those people that do not use a case on your phone, then I guess having a screen protector is useless because evidently you're not going to care what the phone looks like with dents scratches and dings