Not my favorite Hitchcock film but definitely a must-see for any thriller fans or budding cinephiles. There are moments in this one that are truly remarkable and stand out, even within his body of work. I instantly go to the final sequence or the famous shower sequence examples.
Think about it, he basically laid down the blueprint for 99 percent of all horror movies made with this and The Birds. Crazy homicidal maniac, and crazy stuff happening for no real understood reason (which is probably the more terrifying of the two)