This is a low budget movie, very low budget in fact, but as such i definitely have seen much worse. There are elements that works rather well. The score and the actors are the best parts. Also the camera work is quite solid and the make-up department has nothing to be ashamed of with the gore work being one of the films strongest parts.
On the negative side is a thin story that can't fill up the 90 min of running time. The gang of five spend the last 75 minutes of the film at the mysterious gas-station and that is at least 30 minutes to long. As a result the film becomes slow paced, which isn't something that has has to be negative, but the script doesn't compensate by developing the characters. The audience actually doesn't know anything about them when the film is over. In this aspect the film fails completely.
Due to the fairly uninteresting events in front of our eyes with a bunch of strangers running around and shouting each others names randomly, it's no surprise that the suspense factor drops. There are some moments, but to few to keep me fully interested. The stench that the viewer should understand to be something threatening does not work particularly well simply because that out of all things that scares us, 99% is sensed through our eyes.
Nuf said. The ending is clever and answers the questions raised during the movie. I believe the film maker has some talent for this genre and it will be interesting to view his next effort, hopefully with a bigger budget.