I've noticed that some people have rated this movie a 10. Others have said it's one of the worst films ever made. The truth is somewhere in the middle. If the budget of this film was actually 7K (pounds or dollars?), then it's a very impressive achievement. That said, it's not nearly as good as El Mariachi as some have suggested.
The film moves slowly through the first 20-30 minutes and it's unclear what's really going on. Yes, a cop is investigating a series of murders, but what's really going on? As the film progresses, some things fall into place...but not all of the pieces. Some of the scenes are head-scratchers. What's up with the little girl and her mom? I didn't see a reason for them to be in the film.
As for the technical aspects of the film, the music is very good in a few instances. For the most part, it's terrible and inappropriate to the action. The cuts back and forth do not bother me; it actually provides a fairly suspenseful climax, which was the best scene in the film. The acting is of decent quality, with no outstanding performances. Overall, the film is a 7/10. If you want to see a bad movie, skip this. If you can stand a slow-moving noir, then check it out.