I'll give Sunil Shetty's performance a 5/5. He fits the role perfectly as the terroist and made the movie a lot better. I liked his character development in the movie where it showed flashbacks of him killling those innocent Pakistanis and how he become a villian. Plus, his appearence was brilliant and he really looked like a terroist with the long hair and beard.
I also liked the scene where he was disguised a teacher and the fight scene between him and SRK was superb.
The only problem was that he didn't receive a lot of screen time compared to the other casts which was shame. That's because the whole college stuff dragged on for too long.
Overall, Main Hoon Na was a excellent movie with very good songs. SRK, Zayed Khan, Amrita Rao, Sushmita Sen and Boman Irani gave superb performances. I'm gonna give this film a 4.5/5.