While "Saving Mr. Banks" is based on the actual events that led to the making of "Mary Poppins," one of the most justifiably beloved films made during the entire time Walt Disney was the actual head of the studio that still bears his name, it is corporate myth-making on a large scale, and some of the choices that were made in telling the story make me uncomfortable. As a piece of entertainment, "Saving Mr. Banks" is very well-made and emotional, but as something that purports to be true, it is disturbing in the way it rewrites actual events.
P.L. Travers, creator of the character Mary Poppins, was a complicated figure by any standards, nearly as complicated as the most famous character she created, and her relationship with Walt Disney was contentious, to say the least. The script by Kelly Marcel and Sue Smith covers the broad strokes of their famous interaction and the film makes some very smart observations about the creative process. In particular, Emma Thompson's portrayal of Travers is filled with lovely grace notes, and I'm sure at least part of that is informed by the fact that Thompson is a formidable writer in her own right. She understands the highs and lows of being a writer, and she captures the emotional weather that most writers face in pretty much every moment she's onscreen.