Take out Zach Galifinakis and it would've been a better movie.
I didn't really have a high hopes for this movie but I like Jon Hamm and it seemed like a good date movie.
This would've been a good (not great) movie except that Zach just seemed really out of place in this movie. He's good at being odd but anytime there's a reason for him to actually act like a person he just wasn't as good an actor as the others.
He's fine for things like the Hangover but this wasn't a good role for him. Also, on no planet anywhere would his character have landed a wife like Isla Fisher, that nagged at me the whole picture...