I Netflixed MOON based on recommendations of numerous Facebook friends, but I have to say I was underwhelmed.
If this had been a SyFy original, I'd have been impressed, but overall, it's a long TWILIGHT ZONE episode. The problem with a 97 minute episode is that it gives you way too much time to think, and every "surprise" plot point telegraphed itself far ahead of time.
The saving grace for the film was the fine acting of Sam Rockwell. It's tough to explain without giving away plot details, but suffice it to say that he gets to show a wide range of acting skills.
Worth a rental for real sci-fi fans, but otherwise forgettable.