Not a 10, but close

Rating: 9/10 (22 March 2020)

Hitchcock is one of the best directors ever. The special affects will make you cringe. But you'll probably forgive that because of other elements like: script, cinematography, location, thought-provoking eco-commentary, etc.
Why did I give it such a high rating? Because in the hands of another director this story would've come across like Plan 9 From Outer Space.
I also like the fact that the movie spends as much time making you think as it does tapping into your primal fears.
It's my favorite Hitchcock movie. Is it his best? That's for others to decide.