Amy Adams as Margaret is excellent. Christoph Waltz's over-the-top portrayal of Walter -- who, by many accounts was truly over-the-top -- can be a bit distracting. At any rate, it's an interesting exploration of how the "little hobo kids" became a household must-have.
Filmmakers can't resist all that color or the movement of falling leaves, with deep nostalgia swiftly evoked in a few frames of swirling red and gold. Regardless of plot, cast or dialogue, the unsung hero of the autumnal movie is the cinematographer.
Hancock is not an adventurous director, but this is not an adventurous film. It is, however, so entertaining that it will win you over. In fact, it did the nearly impossible; it made me want to see Mary Poppins again.