I'm always interested in movies about songwriters, being a huge fan of the Great American Songbook. This is the story of Bob and Dick Sherman who were in-house songwriters for Disney for a couple of decades. We have these guys to thank for the earworm "It's a Small World" along with the hit songs written for the grown-up mouseketeer Annette. Need I say more? I found the documentary engaging, mostly because I'm interested in the process of songwriting, and also for the human interest. These brothers, who worked closely together on the music, really had nothing at all in common, went their separate ways in their private life, so much so that their kids did not know their cousins. I don't find that hard to believe at all - plenty of brothers share very little of their lives. These two happened to be in business together, and they made it work.
Most interesting was the insight into the inner workings of Walt Disney studios and the profile of Walt. I enjoyed the story about when Walt Disney went to New York to see Julie Andrews in Camelot to check out whether she would be suitable for Mary Poppins. The rest is history.
Long story short, this is a doc that's worth seeing for audiences that are interested in songwriting and movie history, and perhaps for those for whom Supercalifragalisitc.... is a treasured part of their childhood. Myself, I'm not a fan of the Disney brand of musical of that era.