Story- in my opinion the story was very good, hats off to Imtiaz. I really liked the concept of both the stories running parallel and in my opinion the film didn't get confusing at any minute.
Acting- Saif Ali Khan is brilliant, his acting as Jai was better than his acting as Veer, he carries of both the characters with ease. Deepika was also very good, she is improving after Om Shanti Om.
Overall- the best film of the year, this film shows how much indian cinema is moving ahead, go watch this film now. MINDBLOWING MOVIE !!!!