It's been a while since I've seen a new Lukas Moodysson. This is one of his lighter outings, closer to Tillsammans than Lilja 4 Eva, and proves that Swedish girl-punks can outdo any vampire. The script is based on a autobiographical graphic novel by his wife. I don't know where he finds his actors. It's laugh-out-loud funny at times (abort all parents!), and sweet. Their performance in Västerås is priceless.
Much background detail at the NYTimes by Marc Spitz. A. O. Scott somehow has the idea that Moodysson is subtle. Dana Stevens got right into it.