The film itself is a haunting nightmareish world, which is like a faint marriage of Twilight Zone with an amateur performing troupe. It pre-figures the uneasy yet solid monochrome of Night of the Living Dead, yet with a spaced-out strangeness of story-telling not unlike Dementia aka:Daughter of Horror. It isn't slickly made, but though low-rent, has an americana feel that permeates the dreamy-nightmare.
However, as usual, true to form, released in the UK by Elstree, the picture indeed the very substance of the film is vastly inferior & downright appalling to view. Muted & rough, looking like it has been handled by apes in boxing-gloves. Avoid, find a superior print where possible or ones opinion of this underground classic will suffer badly.