"Look who's back" turned out to be a fine novel maybe lacking some in-depth knowledge about Hitler, yet a very interesting idea to portray current Germany through Hitler's eyes in this satire.
The movie, however, fails in adapting the novel adequately. In addition to that, literally every change is bad. One of the emberassing highlights is a scene that parodies (or so?) a famous scene from "Downfall". Its humor fails completely to be funny, and unwillingly funny are the "dramatic" scenes. An interesting part is there, however, when we get to see documented scenes of Hitler meeting with people from all over the country.
In conclusion, if you're interesting in this topic, I recommend rather reading the novel. It's worth its time more than the 2 hours it would cost you to watch the film adaptation.
The movie, however, fails in adapting the novel adequately. In addition to that, literally every change is bad. One of the emberassing highlights is a scene that parodies (or so?) a famous scene from "Downfall". Its humor fails completely to be funny, and unwillingly funny are the "dramatic" scenes. An interesting part is there, however, when we get to see documented scenes of Hitler meeting with people from all over the country.
In conclusion, if you're interesting in this topic, I recommend rather reading the novel. It's worth its time more than the 2 hours it would cost you to watch the film adaptation.