This is the infamous psycho movie that advertised itself as being filmed in "duo-vision." Duo vision just means the entire movie uses split screen images. The split screen technique works well during some sequences, but having the ENTIRE movie in split screen gets distracting and annoying after awhile.
The story involves a maintenance worker at a resort hotel who murders and dismembers some of the female guests. There are a few bloody stabbings and dismembered body parts, but overall it isn't very shocking.
The movie uses a lot of music that was used for the silent PHANTOM OF THE OPERA. Usually, one side of the split screen shows a woman playing this music on an organ while a murder or something is happening on the other half of the screen.
This is one of those movies that you should probably watch at some point in your life (for no other reason than so you can tell people you've seen it). But don't expect anything you haven't seen a hundred times in other movies.
Oh, by the way, Ed "Kookie" Burns is in it!