How bad is it? It was the last gasp of a dying cheap studio.
Should you see it? Yes. It's silly enough for a view.
John Carradine plays a mad scientist who discovers a 17th gland, containing the secret of youth and long life. He gets Tor Johnson to kidnap mental patients for experiments, who end up as mutants in the basement. Carradine overacts and plays the organ (like he did in The Black Cat in 1934). There's a buried alive sequence and a silly twist ending. Tor turns on carradine, releasing Allison Hayes and escaped convict Myron healy.