The problem with these otherwise very cool looking hard cases is that in the long run, they will most certainly damage your phone's plastic casing. I'm speaking from experience. It's not something one can't live with, but still, if your sole purpose is to keep your precious N900 intact, i'd suggest you give the ugly silicone cases a try. They seem to work best for me, apart from the fact that it's impossible to charge, or listen to music, or do anything, without removing the case. I'm still trying to get used to that