When a movie gets itself over certain hurdles, establishing believably, mainly, and creating audience sympathy with/for one or more characters-- I am willing to silence my nagging inner critic, who is perhaps a thwarted pleasure principle raising its head to be fed.
Sarah Polley makes this film. Her acting was excellent, but I found myself, at first, most delighted by her "Norwegian" accent. As the movie went on, I got addicted to that accent, which for me had become integral to her performance. She, not Hurley, not Penn, was the centerpiece of this movie.