We wouldn’t blame anyone who got only 20 minutes into Take This Waltz and quit. Writer/director Sarah Polley’s movie starts slow and even a little annoyingly. But trust us; there is a big payoff. A married woman, Margot (Michelle Williams) tries to choose between her loyal but boring husband Lou (Seth Rogen) and Daniel (Luke Kirby), the free spirit she meets on a plane who just happens to live across the street. While debating infidelity, Margot talks gross, creepy baby talk with Lou (“I want to eat your eyeballs?”), leads Daniel on and sits around looking morose (being Williams, she does all this beautifully, of course). The tension builds until you’re dying for Margot to just get it on with Daniel already. Once her decision to act or not is made, Polley’s film takes off and becomes a whirling (literally, Polley sends her camera on many 360 degree rides) revelation about how relationships inevitably evolve, how people may seek new excitement only to turn it into more of the same old same old, and how essential it is to know how to be alone.