Gran Hotel (1944)

This is probably the best Cantinflas movie ever. Not only because at that time both Mario Moreno the actor and Cantinflas the character had the required maturity but also the needed freshness to successfully develop comedic plots, as well as production values, and the quality of the script.

It is a fine comedy, whose gags are, to some extent, hard to get for non-native Spanish speakers, because of the very nature of Cantinflas, whose charm depended heavily in complex but meaningless word games that express but the ability of the "regular Joe" to deal with issues, as well as the tensions within Mexican society during the years of the economic expansion brought by the second World War.