If there's one thing that wounds On the Road, it's that the film is full of things -- having sex, doing drugs, being free -- that are far more enjoyably experienced by one's self as opposed to watching other people enjoy them on screen.

Stewart, selected for Marylou five years ago on the basis of her striking debut in "Into the Wild," is perfect in the role, takes off her clothes more than once and nearly always seems to be breaking a sweat, which kicks the sexiness quotient up high.

A decent, well-cast and mounted adaptation that hits all the right notes but plays them in a respectful, muted monotone.

It may lose its way on occasions, but thanks to a committed cast and a script that captures the Kerouac vibe, Salles' adaptation never ends up on the road to nowhere.

Evocatively lensed, skillfully made and duly attentive to the mercurial qualities of its daunting source material, Walter Salles' picture pulses with youthful energy but feels overly calculated in its bid for spontaneity, attesting to the difficulty and perhaps futility of trying to reproduce Kerouac's literary lightning onscreen.