To Max Ophüls this was an assignment (from the UFA), a pure routine job. One hardly recognizes the later Ophüls in this film (shortly made before his masterpiece "Liebelei"), but still Ophüls made this routine job into a well-paced, stylish and sometimes extremely funny romantic comedy; he probably could not do it any other way. The script is fine with some hilarious dialogue. The use of the surnames of the characters is simple but clever.
Having Ophüls in mind the film can also be considered a celebration of happy-go-lucky life: contrasted are those who live an easy going, wine and dine life with those whose narrow-minded life is based on punctuality and mineral water. Maybe that is why the film was banned in 1937: it was considered a film that could endanger public order and national-socialist feelings.
Good cast with Heinz Rühmann who shows his natural comic talent at best and Max Adalbert who is very good as the grumpy uncle; supporting cast good as well. Chauvinism makes me want to point out Lien Deyers (as Gina), a fine, charming and attractive actress from The Netherlands who had a successful career in German cinema.