I have a 6280, and yes, it does feel a little loose when closed, but when its snapped open it feels rigid and more like a "normal" phone.
The good thing about this phone is that it has good shortcuts, most things can be done without having to reveal the numberpad underneath and it has a brilliant camera.
I also upgraded the mini SD to a 1gb card and use the phone as an mp3 and video player (they only gave me a poxy 64mb card with it - cheapskates!)
Dave