This great movie is still somewhat of a "non-classic", which is sad. Several German movie books don't even mention it (Klassiker des deutschen Tonfilms). Now the film is restored and available on Blue Ray. It can even compete with many American classics of the times. A great mix of music, fun, realism and comedy, the film makes you also sad because of the talent that left because of Hitler (producer Pommer, Käthe von Nagy, director Berger...).
Go watch it if you like old classics (it should be one!).