I think this is his best movie that I've seen. No man gives a better performance in a Hitchcock movie (except maybe Anthony Perkins) than Jimmy does in this one. The pacing is absolutely perfect, the visual style is gorgeous, and the acting is fantastic (including the absurdly hot Kim Novak).
*SLIGHT SPOILER*
When you see the shadowy figure at the end, I still get goosebumps. Every single time. What a creepy fucking ending.
*SPOILER OVER*
But yeah, it's not my favorite to sit down and watch, but it's so damn good.