Yes it is absolutely woth downloading and installing this on your N900 just to see that a full desktop linux distro can (easily) run on the N900 so basically you have a full computer in your pocket.

Almost everything works except one important thing: SGX. There are no drives on the internet you cannot install it, therefore the CPU have to run a huge amount of processes and render the desktop environment also. This fact makes it a little bit slow and sometimes really annoying but it works.