The film starts off with a pretty good story set up surrounding the murder mystery plot. The characters are a bit cliched, but they fit in with the spirit of the murder drama they boarded the train to experience. The twists, tension, and character changes in this part of the movie are actually very intriguing.
Then the whole thing falls apart to become a silly monster flick with B movie dialogue and almost cartoonish acting.
Watch it up to the derailment, then shut it off. You will be far more satisfied with the unresolved fates of the characters at that point than you ever will be with the absurdity of what is about to come next.
