I was able to attend a screening of Saving Mr. Banks last night. What an amazing film and story! From the trailer I was a little concerned with Tom Hanks, but I totally believed he was Walt by the end of the movie. Emma Thompson was outstanding in every way possibly. I smell Oscar nomination for both of these brilliant actors. I know there has been some talk on these boards about the time period accuracy of the Disneyland section. I'm pleased to say that none of the discrepancies took away from the film for myself, and I don't believe they will for you either.
I would get into more detail, but I think it's better for you to check out this amazing movie when it hits your local theatre.
I give this film 4 1/2 stars out of 5. It has heart, history, and depth.