I've had my screen protector on from the day i opened the box, bought these cheap protectors on ebay for few bucks, perfect fit, easy to install. I really cant see a reason why not to use one, if the protector gets bad scratches on it like i already have, u can just replace it. and if i ever get tired for my n900 or its time to get new phone i get better price for it But who am i to judge anyone, everyone chooses your own path