Indian movies are not meant to be what Dev.D was. It takes guts to show women as this one did, and it takes guts to show reality as this one does. It was hard, and it was real. You might end up calling it an adult film, but the story is so much more than just that. 
For once, the songs weren't a liability on the movie. For once, the director bothered more about what he wanted to potray than the sensibility of the veiwer. It was creativity at it's very best. 
Deserves every fragment of the 5 stars that have been bestowed upon it.