Pretty damn poor effort.
Got bored, decided to rent a movie. Sometimes an independent movie like Moon comes along, and blows you away with a great story with minimal cast.
Sometimes you get the stinking pile of dung that this is. No strong characterization, a plot that after the half-way point becomes laughable, no tangible arc to the story that carries you through the dialogue, and finally, an ending that isn't. I don't mind movies that don't have cut-and-dried endings, that leave some things open to questioning, but in order for those movies to work there has to be a strong everything to make it work, including a plot that is clear and concise such that you have some idea of what actually is happening, not just a bunch of vague notions.
A rubbish waste of time, this movie. 2/10.