Yes I bought the Zagg full body protector and its brilliant, well worth the money. The screen protection is barley visable and does a great job of protecting the screen, even covering up old scratches. The back part is not noticable but does make the n900 look shiny, in my opinion this does not make the phone look worse.

Applying the protector can be quite tricky as it is a very tight fit, especially the back section. The protector covors most of the phone, other than the side with the headphone socket and locker slider.

I used to avoid using the stylus on the screen because of scratching but now I can use pretty much anything on it without a mark. Highly recommended.