The other reviews are correct that this movie bears some resemblance to 'The Hitcher' or other movies that take place on the highway and involve brutality and murder. But I think what a lot of the reviews fail to acknowledge is the humor, dark comedy, and other virtues this film has to offer. I think it's a movie that improves with time because stylistically it now feels classically dated and rugged in an early 1990's sort of way that is mostly lost in modern films, although 'No Country for Old Men' touches on a similar style, as do Robert Rodriguez films. It's a satisfying movie because the pacing is good, the acting is good with at times excellent characterization, and there is a fair amount of drama that is actually quite compelling. It leads to a certain amount of excitement that isn't ever boring, and it makes for a good "guy" movie; the sort of film that if you don't take it too seriously, offers a certain likability of the joking villains and a general lightness, recklessness, and irreverence. Overall it can be a quite enjoyable experience to watch.
Review of The Road Killers
