amitabhs acting was superb as always. abishek needs to do more of these type of drama movies - really helps him to "grow" as an actor. vidya balan made a big jump in her career from munnah bhai to working with the bachans..definitely a pivotal role for her. all in all - job well done.
of note: the kids acting was adorable! especially auro's best friend - forget his name) but the one who’s always complaining of his father - his dialogue was very entertaining!!