I liked everything but the "documentary" aspect. Too many flashbacks/flashforwards, needlessly restrictive camera angles, pointless exposition, and it was really easy to lose track of the chronology. They even reveal one of the crewmember deaths before you have a chance to meet the guy, then they jump straight to his death, which was supposed to be a pivotally emotional moment for the crew but you haven't had a chance to care yet.

I don't regret watching it, I think it was a decent film overall, but it needed a different director.