After seeing some film stills, I thought this picture might have the quality of some of the later Fritsch/Harvey movies like "Glückskinder" or "Ein blonder Traum".
While the film is fairly entertaining, some scenes are uneven (too long, too loud, too silly). Lilian Harvey is just as good as some of her Hollywood peers, but in some parts the parts don't make a complete picture. Rühmann's part is too long (as a kind of Ralph Bellamy character), Fritsch shows up too late and Roberts (a Saxonian actor who was in no way Anglo-American) is so slow, silly and strange that the idea of Harvey being his wife (even the gold digger sort) is nothing but ridiculous.
The AD is great (Erich Kettelhut worked with Fritz Lang and many other German film greats) and Holländer's music is quite good.
All in all: it is mostly a movie for people who are interested in the history of European films.