Given what we’ve seen Tina Fey and Amy Poehler accomplish over the past few years; given even a mediocre script, the expectation would be a funny film when the two are the leads in a project. Sisters, a film from the very talented director of Pitch Perfect (I’d have given it a better review than TailSlate’s other critic did) does a bit better than just funny. Probably because screenwriter Paula Pell knows how to use both words and visuals to generate laughter.