So I saw it. While it's thought provoking sci-fi, I think it requires some patience from moviegoers that's in short supply these days. I think maybe 4 or 5 of us were at the 7:10 p.m. show. While I didn't fall asleep, if you don't have patience for watching two people talk for long periods, you might take a pass.
Also a chance to see Oscar Isaacs before Star Wars presumably turns him into a box office X-Wing pilot star.
My take on the movie's conclusion is something like:
So certainly I give it a thumbs-up. Just don't go in expecting an arthouse Terminator or something.
Since most of the film is almost claustrophobic (it would probably make a fine stage play), it should work well on TV later on.