I had high hopes for this film. Being a huge fan of Michelle Williams (who for me can do no wrong) and also quite fond of Seth Rogen and Sarah Polley, I expected something quirky, perhaps bittersweet, but a pleasant way of spending a couple of hours. Sadly, this was not what I got.
While the acting is strong by most involved, the plot irritated me and the characters were hugely unlikable (with the exception of Lou (Rogen)). The dialogue too was so pretentious in places it was reminiscent of an episode of Dawson's Creek, so you couldn't help but reel in gall at how contrived a lot of it was.
But the main problem for me was the "romance" between Margot and Daniel. Margot seemed to have an almost idyllic life with a loving husband and a good job, the only thing lacking was a bit of intimacy, which could be fixed if you worked at it. You could understand that she was bored, or wanted a bit of excitement, but it doesn't explain why she chose to actually leave Lou (or why he let her go so easily).
And Daniel is such a hideous character. He's like a stalker, turning up unannounced at every opportunity (the bit at the water aerobics class was particularly creepy), seducing Margot with his sinister sex talk and generally just being a super lecherous weirdo. How anyone could fall for him is totally unbelievable. Does Polley really think that's what all women want? Ugh.
The only redeeming feature of this film is the fact that it doesn't all turn out well for Margot. She realises quite early on that she has made a huge mistake and there is no going back. You almost have to stop yourself from cheering when Lou makes no bones about not wanting her back. "F--- You, Margot! You lie in that unhappy bed you've made!" you almost scream at the screen. But you know that that probably isn't how you're supposed to feel. You're supposed to identify with Margot, but you only end up disliking her. And that's where the film really fails.