I agree to kaushik dave up to some extent that it bears a resemblance with Amores Perros but at one point only and it is that there are three different stories meeting at one point but that is the end.
What impresses me more about this movie is the true depiction of youth's mind (sp. in Pakistan, India and other third world countries). Today's youth is matured but confused, helping but selfish for themselves and above all sentimental yet insensitive. Like Arjun, on the face he is loving, caring and always wants to be with family but inside wants to go to US for good career. Same is true for Lallan, very selfish thinks only for himself and nothing else. But the true high point of the movie is Michael Thinking and approach towards things. He is the one driving force for others.
As per direction, Mani Ratman's movie is always special for its visual feat and that is also true for this movie. And above all AR Rehman Music is true to the story.