as with everywhere there is always good parts and bad. i spent 2 weeks in dehli working at an airbase and the airbase and surroundign area was amazing as it was very well off but be prepared to see some very very poor people living on roundabouts and on the side of roads too.
definately an experience and in dehli worth going just for a 40mph ride in a tuk tuk the wrong way down a sliproad in the dark with no lights for 30p!!!