This is a weird film. It would probably make a better play. The space mission depicted is entirely unrealistic and the story told is revealed in a non-linear, disjointed way. So if you get past that description, and you aren't looking for something along the lines of 'Gravity' or 'Sunshine' it's not so bad.
But. It's kinda slow. It takes a while to work out what really is going on and what the film is interested in. The space aspect of it really is incidental, the film 'Moon' might be a reasonable comparison (another film that would probably work well as a play...) The final scenes are devastating if you've stuck with it. It's well-acted, I thought, with a peculiar retro-future feel that some people may find appealing. I nearly gave up on it about twenty minutes in but ultimately I'm glad I didn't.
Review by Sarah Ruscoe from the Internet Movie Database.