I am thinking about purchasing a screen protector film like most people, including me, have for the PDA, CellPhones, etc. Has anyone tried this or other products that offers screen cover? Do you find that this is worth $18 or whatever you paid? I have never had my screen damaged but it is my first Mac and first PB, so I thought the extra consideration wouldn't hurt. Since this will fit on my V505EX as well, I thought I would ask before buying.