It is brilliant. Peter Sellers and Blake Edwards had already done the Pink Panther films before this cult classic. Sadly in today’s world, this would likely not be made.
The Concept and Script
Instead of relying on a dense, traditional script, Edwards and Sellers shot the film on a largely 63-page outline. Much of the movie was heavily improvised, deliberately serving as a tribute to the classic silent film era (featuring visual gags inspired by Buster Keaton and Charlie Chaplin).