People seem to be split on this one, but I think this is a solid dramatic sci-fi thriller. Yes, the topic of survival in space has been covered many times, and there are some fantastic films in this subgenre, but the moral question at the core of Stowaway makes it stand out. The crew are faced with an impossible dilemma, and the idea is absolutely a conversation starter. That, and there are some part of this film that are INTENSE. I wish this was something I got to see on the big screen - there are some beautiful shots here, and movies set in space just feel like they're meant for the cinema anyways.
Wish the ending had a bit more to it though. It just felt like "Well, that's it then, guess we're done". The resolution happened, yes, but it needed a bit more room to breathe.