It's terrible and a typical "Hollywood Hitler".
The best "Hitler" in a movie was played by Alec Guiness in the "Last Ten days"
There's a new German Movie about the last days in the Führer bunker.
Der Untergang From the trailer it to seems like another Hollywood caricature rather then a real person. Maybe Hitler was really like that but to me it seems over the top especially when reading descriptions from his close associates.
I think in the long run, especially if the only impression folks have of Hitler comes from these types of films, betrays the historical record and makes it easy for people to rationalize away his true evil by seeing him as something less then a "real person".