A well made, gritty science fiction movie, it could be lost among hundreds of other similar movies, but it has several strong points to keep it near the top. For one, the writing and directing is very solid, and it manages for the most part to avoid many sci-fi cliches, though not all of them. It does a good job of keeping you in suspense, and the landscape and look of the movie will appeal to sci-fi fans.
If you're looking for a masterpiece, this isn't it. But if you're looking for good old fashioned post-apoc, gritty future in space sci-fi, with good suspense and special effects, then this is the movie for you. Thoroughly enjoyable, and a good ending.