I liked this movie, even in spite of all it's structural flaws (And there were many). The reason? Quite simply it's the cast. the way they bounce off one another, the way the dialogue is delivered, the sheer chemistry between the teams of Ansari/Eisenburg and McBride/Swardson, is fantastic and very enjoyable. The plot may be forgettable, but that just makes the cast stand out even more by comparison.
This was a solid film. A mesh of a few different genres: sci-fi, horror, western. I say western because of the environment as well as the whole revenge/hostage part of the story. Mostly though this was just a good escape film.