Bohemians Arnold (Erik Clausen) and Benny (Kim Larsen), unemployed plumbers who earn their livelihood moonlighting, create their own little anarchic world in an abandoned factory. This gentle satire owed its fleeting popularity to its stars, cavern-mouthed pop star Larsen and comedian Clausen, the latter especially known for his satirical comments on the Danish establishment in particular and bureaucracy in general. A throwback to the wild and woolly 1968 Summer of Love, Midt om Natten was slightly anachronistic already when it premiered.
~ Hans J. Wollstein, All Movie Guide