Galifianakis [is] able to turn on a dime; balancing his disarming humour with moments of anguished outbreaks. His is one of the best supporting performances of recent memory; equally funny and heartbreaking. If only I could say the same of the movie.
The film's central element -- its sensitive exploration of a young teen's emotional confusion -- creates strong audience empathy, however, and gives Fleck and Boden a fertile focus for their signature light-hearted humanist storytelling.
Boden and Fleck expertly negotiate the fine line between sunny optimism and deepest despair, as Craig's emergence into a renewed love for life is offset by the rather different kind of departure that is delicately hinted for another main character.