Quite enjoyed it, despite spending much of the film wondering where I'd seen the lead character before. Turns out she's Carey Mulligan, who played Sally Sparrow in Blink. Also features the lovely Olivia Williams, who played Adele DeWitt in Dollhouse.
The story is a coming-of-age tale set in the sixties, where rougeish rouge David (Peter Sarsgaard) picks up 16-year old Jenny (the aforementioned Carey Mulligan). Slightly uncomfortable with the setup, it turned out to be an interesting story, well played by the leads. Not one I'd particularly watch again, but a pleasant enough way to spend a saturday evening in.