Why is the survival genre a survivor? The obvious, 'well duh' answer is that it forces us to question what we ourselves would do in an extreme situation. Or, at least, provides questions to annoy co-workers with, such as: "Would you drink your own urine just to have enough energy to saw your trapped arm off?"
The presence of Josh Brolin, Joseph Gordon Levitt, and original stars Bruce Willis, Powers Boothe, Jessica Alba and Rosario Dawson gel nicely. The hard boiled characters and narrative are terrific, violent, sexy, extreme, brutal and seductive, but strip away the visuals and creative flourishes and truth is you're left with some rather dull stories.