TCM has an overview, as does AMC. 1000 Misspent Hours gives it 1 star. (Hey, at least it got a star. They give some movies negative stars.) They warn against it, saying
For despite having been promoted as the horror movie it sounds like not only by its original producers, but by a succession of subsequent distributors as well... it is instead an appallingly dull juvenile delinquent film in the style of the mid 1950’s.