This is a one joke movie, with not enough of the joke. Michael Cera plays George-Michael BluthPaulie Bleeker Nick Twisp, a boring loser who invents an alter-ego, Francois Dillinger so that he can impress a girl that he is in love with. Unfortunately Francois enters the film too late and isn't in it enough to make me want to like the parts he's absent from.
I saw this film about a month ago and can't remember any of the details, good or bad. And that's probably the most accurate way to describe the film: wholly forgettable.