I have the n900 since the summit, since then I have been really careful with it, I have had it in my pocket on occasion, but not with keys or sharp objects, or sand for that matter Today when I was cleaning my screen I noticed tiny tiny scratches in the screen, you have to look really hard and they're almost invisible, but they are there, and they are not going away. (I think they have been caused either by my nails or by the stylus) There for, since I have been careful with it (and leaving it mostly at home too), I'm thinking of investing in a screen protector to prevent any further damage. If you don't care about tiny almost invisible scratches in your device then yea, don't bother, but otherwise its not a crazy idea to buy a screen protector.