This movie is a lighthearted, unpretentious comedy to be enjoyed as such. I don't understand why people come on this site and write pretentious criticisms as if this movie were made with winning an Oscar in mind. I liked the movie for what it is.
Also, it's recommended to have relatively good command of the German language, as some of the humor in this movie is pure speech humor which, some of it, can't be translated (for example the way Chantal speaks).