I like budget movies.
I like the pacing, I like the way they try to tell stories, it seems more real.
Not b-movies, which are movies that are terribly good, but movies that could've been great with a good budget, but more likely slashed if they ever saw a cent, even so.
I think this fits it. They had a good idea of how to build suspense and how to create twists that would change your idea of the story, of the ship, and of the people.
I love the last two twists. The asteroids, wasn't a twist just a reveal, but the bomb's religion and the surfboard . . . wow.
The story did drag itself out, in that the hunt for the alien went on well after they could've cut to Pinback saying "and then it deflated, like a balloon".
But they had a really good scene there, the elevator scene, which was too good to cut but too long to leave in.
I think they drew that out a bit much.