For me, this film is a disappointment.
First, too much expectation, rave reviews, the master thriller Hitchcock, Grace Kelly - can it not give a result? Secondly, he read the literary basis (detective story) as a child, and he was very memorable. So really dark, intriguing, creepy. Not every detective leaves a trace in his memory. In general, in combination with Hitchcock, he expected a chilling thriller, and eventually received some light melodrama, almost a comedy. Nothing exciting, the hero just watches the neighbors from the window, but nicely communicates with his girlfriend (Kelly), the detective component is taken into the second part and almost into the background.
Yesterday I decided to re-read the story of Irish, I thought that perhaps in my youth I overestimated its effect, and MB did not notice humor and romance. No, it's a Hitchcock story. But the movie is different.