Fantastic performance by Joan Crawford who veers from bat-shit crazy to a meek little mouse, sometimes it seems like in the same scene. The mystery isn't hard to solve, especially considering the screenwriter, but is fun enough to go along with the ride. And absolutely love George Kennedy's Boo Radley-like performance.
Obviously an attempt to cash in on the success of 'Psycho' - it even borrows some of the plot elements - this film goes for lurid shock more than Hitchcock's masterful suspense. It's a bit too long, and the twist ending is pretty predictable, but this is still a fun pulp horror film - thanks in a big part to the over-the-top atmosphere and Joan Crawford's hysterical performance.