Tooth & Nail has delusions of grandeur. It wants to be a commentary on what may occur if oil supplies dry up and portrays this as an apocalyptic disaster which leaves humanity on the brink of extinction. What we see is a battle between two factions for survival.
This could have been a great film if the makers had put a bit more than six weeks effort into it. What could have been a rival to films like 28 Days Later quickly turns into a run of the mill slasher/survival film.
Not awful but could have been so much better.