Sensible cinema, terrific performances, and a Kahaani that holds you till the last shot is what Kahaani is all about.
It sucks you in almost as soon as it begins. It's primarily the setting that breathes life into the film. Pat on the back to director Sujoy Ghosh for getting it right, for capturing Calcutta the way he did. I have never been to the place but nothing could make me more familiar to it than Kahaani.
Script writer Advaita Kala surprises and how! I had read a book by her back in college - Almost Single. It made for a fast-paced, enjoyable read.
For those of you who love Bollywood or love trashing Bollywood, go watch Kahaani!