Utterly brilliant!
I haven't watched 'Mary Poppins' itself in many, many years but still have memories of it as a kid. That meant I had the desired knowledge of the key parts about that film, which I'd say is probably wise to watch before this - though not a requirement, at least in my opinion.
Ironically, Travers' complaints about the animation segments to the 1964 film are justified on my end - I've been on a Disney marathon since May, but to "shorten" the watch load I decided to only watch the studio's productions that are straight up animation or straight up live-action, so MP missed the cut given it's a combo. If she had her way, I'd have watched it again relatively recently. Damn you, Mr. Disney!
Anyway, 'Saving Mr. Banks' is an outstanding film! One that's filled with so much heart and some rich storytelling - loved the back and forth between Travers' early and later years. They entwin the two films together very well, while the Disney stuff - while in your face - adds humour as well as meaning.
Then you have Emma Thompson and Tom Hanks. Two actors I adore already. Hanks plays Walt Disney very good, he's top notch in this. However, it is Thompson that steals the show. She's superb as Travers, who isn't the most likeable character but Thompson ensures you stay invested in her. She's great in 'Treasure Planet' and 'Nanny McPhee', but this is the best I've seen from her so far.
Elsewhere, shoutouts to Colin Farrell, Ruth Wilson and Paul Giamatti for what they bring - especially Farrell. Jason Schwartzman and B. J. Novak are good as the Sherman Brothers, also.
A charming and very nicely made film. Can't recommend it more.