We had an amazing tour of the Dharavi slums with the very friendly and knowledgeable person. He spoke excellent English and gave us lots of information on the slum industries and we even got to check out a wedding parade in the living quarters! Can’t reccomend this tour enough, the people in the slums are all very friendly towards foreigners and the tourism isn’t exploitative, on the contrary it’s helping business. It’s a fantastic way to get to know the city, and this tour is THE one to do!