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.
Between her cloyingly unfunny sitcom, New Girl, and her ubiquitous iPhone 4 commercials, she's way overfulfilled my daily -- nay, annual or even lifetime -- recommended dosage of Zooey Deschanel quirk.
Especially in the Oscar season, where everything else involves miserable, self-loathing people dying just before or just after they figure out what went wrong, a movie like Yes Man is a perfect counter programming.