I have to say that Moon is probably one of the best science fiction films I have seen in years.
The entire film focuses on Sam Rockwell's character Sam Bell (and the on-board computer voiced by Kevin Spacey) and you can really feel the sense of isolation.
Things shake up a bit when another individual that looks just like Sam Bell is found and Rockwell plays a double role for the rest of the film.
It was a wonderful little film, which I expect to be quite high on my top films of the year.
(Read an extended review at MONDOmagazine)