El (This Strange Passion) is maybe Luis Buñuel's best film -or rather, his most accessible film. Definitely, it is my favorite one.
A story about jealousy, it is electrifying since the very beginning. There are many unforgettable scenes, keeping the viewer thrilled about which cruelty will come next, and whether Delia Garces (terrific) will finally give up, die, or whatever... There are many twists in the script, surprises and subtleties that can be discovered watching the movie again. The 50s Mexican ambience is fascinating, and reading about the director's obsessions and surrealism will add a whole new dimension to a film that is nonetheless understandable by anyone. [Other great Bunuel's films, like The Golden Age or El Angel Exterminador, are more purely surrealistic and not for mainstream audiences.]
Archibaldo de la Cruz is another great film (also one of the best of Bunuel's Mexican era), and the idea of packing those two movies is excellent.