How bad is it? Extremely incompetent.
Should you see it? Nearly impossible to find, it's not worth the search.
The copy of this I saw looked to be about a 6th generation copy of a VHS and it was almost impossible to see or hear anything. Several actors speak at once, with a cheap in-camera microphone and then music is layered on top of it (there's a title song, which is laughable). A mute girl is sent to a boardinghouse and she turns out to have telekinetic powers given by devil worship... I think; the film is really that hard to watch. Though short, it's padded and there's a sense of menace in waiting for things to happen - completely unintended - with a big final scene that's both awful and worth sticking out the rest of the film for.