An entertaining, if somewhat gory, SF movie. With a reasonable level of intelligence, and well-drawn characters, this manages to rise above being "a horror film set in space". My main gripe was that while the science and technology is just about hard enough to satisfy, it could have been elaborated on more. Still, to be fair, there's more hard science here than there is in most SF movies, and most of it comes in the backstory that is slowly revealed to excellent effect as it interacts with the plot. As for the deep space visuals, ship models and FX, they're flawless. Worth watching, but it's very much "a see-once cinema movie" and I doubt it'll keep its attraction as a DVD film beyond a second or third viewing.