Ram Gopal Varma is definitley my favourite indian film director. His movies are now highly anticipated in India similar to a Spielberg or Kubrick flick.
Kaun is only 90 minutes long, has no songs, only three characters and takes place entirely in one house. All Indian movie conventions are thrown out the door. But, Kaun may be one of the best cult movies to come out of India. (RGV also directed the amazing modern gangster classic Company in 2002)
Kaun could easily be made into a Hollywood ala the recent horror flick The Ring. I will not give away the ending, but suffice to say it will catch you off guard, blow you away but still leave your head scratching.
If RGV had added a few songs, some additional characters and a love story into the mix, Kaun may have had better recognition. But it would have also been a film much weaker in narrative scope. RGV has said many times that, he will only place songs in his movies if the situation warrants it (thats the reason for almost 7 songs in his film Rangeela, a story about a girl making it as a star in Bollywood)
If you have not seen Kaun, do yourself a favour and rent it, then watch all of RGV's films and see a true talented Indian filmaker, trying to elevate Bollywood commercial cinema to a new level
