Ilayaraja - the King of music, performed an excellent work in this movie, may it be songs or background music, he is the only competitor for him in this planet.
To say about Kamalhaasan's acting you might watch this scene from the movie. "His daughter and son with his mother-in-law will come to jail and talk with him, he will notice (unexpectedly) his daughter as a matured girl. His mother-in-law asks her to get blessings from him". At this moment his face will be changed and he will be in tears. He tries to control it and simply listen to his mother-in-law and he wont be able to speak at that time. NONE OF THE ACTORS IN THIS WORLD CAN DO IT.
Rest of the things is left to you to watch the movie. Director Sandhana Barathi has done a good job. A MUST SEE MOVIE.