Oh, I might just go back anyway.
Just to add a few thoughts: The period touches bring BOTH eras alive wonderfully, and I laughed out loud at several points. (I laughed harder at this movie than at anything in Anchorman 2, which I saw right after. That's both a credit to this script and a reflection of the bland writing in the Anchorman sequel, but I digress.)
My favorite line in the whole film is Travers' quip directed at Mickey. I won't spoil the line, but it's so...British, and fairly subversive for something in an actual Disney movie!
Hanks as Walt I struggled with a bit. I don't think it's Hanks' fault so much as that playing a face on Mt. Rushmore is just an inherent challenge. I thought he did an admirable job with the vocal inflections and mannerisms, but the character only really came alive to me in his conversation with Travers near the end of the movie.