I've been using the N80 for more than 6 months now and I must
say that I'm not very satisfied with it.
Firstly, though the camera is 3 megapixels, the picture quality is
not very good due to the lack of autofocus, and you can forget
about taking outdoor night shots as the flash is pathetic.
Secondly, the Symbian OS is very unstable in my opinion, and prone
to hang or restart on its own rather frequently without
warning.
Thirdly, the battery life, at 3 days max, is quite poor.
Lastly, for some reason the antenna is rather inefficient, and
during calls it would warm up rather alarmingly. Goodness knows how
many of my brain cells have been killed by the resulting
radiation.
Hence, my most sincere advice to you is to buy any other phone than
the N80, and try as much as possible to avoid Symbian OS
ones.