What an excellent first RPG experience...
The framerate issues everyone is mentioning is no joke, though. It seems it had a little more refining to be had before they released it, but it overcomes these issues with sheer volume. The content of this game is simply astounding and will keep you interested the entire time. It caters to a fan of any category and will suit everyones own personality or style.
Finally, a game that will take me away from Halo 2, forever.