"Sleeper" is packed with visual (at times it's almost like a tribute to silent comedy) and verbal gags, but personally I don't think it is quite as funny as "Bananas", or quite as imaginative as the best sketch (the closing one) of "Everything You Always Wanted To Know About Sex (But Were Afraid To Ask)" (although the orgasmatron and the shaving-mirror scene come close), and the ending feels rushed. However, it is a very important part in Woody Allen's evolution: up to that point, his films were mostly "Woody against the world"; here, he's dancing (metaphorically, but sometimes also literally!) with a partner - and what a partner! Diane Keaton, at her sexiest and fastest, is almost like a female Woody Allen at times - that's how well-synchronized their teamwork is. Woody is so confident of Keaton's abilities that he even gives her a couple of wild comic scenes all to herself, like her Tarzan imitation, and he sometimes lets himself become the butt of her jokes ("You're dealing with one of the greatest minds you've ever encountered" - "Yeah, and his isn't so bad either!"). Apart from their heavenly pairing, the strongest asset of "Sleeper" is its wonderful jazz score. *** out of 4.
Review of Sleeper
