As much as I like Jack Benny and Rochester and Fred Allen and all the banter that goes on between them, I love this movie because it is maybe the best, though not nearly prominent enough, appearance by Phil Harris. Not only was Harris a great singer with a wonderful baritone voice. (Harris gave voice to "Baloo" the Bear in Disney's Jungle Book.)
But most of all, I love Harris as a bandleader. I think this was the source of his popularity with the generation who could see him first hand. It's not just that he had a great dance band, it was watching him in action: this man had the greatest moves of any bandleader/singer in history. Kay Kaiser was another practitioner of "bandleader as performer". But Harris was able to meld his singing with his bandleading in a physical manner that must be seen to be appreciated. So if you get the chance, watch this silly, funny romp with Jack Benny and the gang, and especially Phil Harris.