I'm giving this DVD a 7, not for the main feature, which is not a very good film. It also is not the worst martial arts film ever, and is probably worth viewing at least once for novelty value. It is most notable for being the first American made film with "Karate" in the title, and one of the first American films ever with any type of martial arts in it.
No, it is the "co-feature" that makes the DVD worth purchasing. Titled "The Incredible Martial Arts Mayhem Kung-Fu Trailer Show," it is merely a compilation of trailers for dozens of martial arts and kung-fu movies from the Sixties and Seventies. Lots of great viewing and non-stop action on showcase here, and a great primer for those unfamiliar with the genre. If you like martial arts films, or compilations of film trailers, then this DVD most DEFINITELY belongs on your shelf. There's over two hours of cool trailers on this thing! Recommended.