You can't go wrong choosing Prashant to guide your tour.  He also easily arranged a very nice van and driver.  His prices are very reasonable.  Prashant is a very knowledgeable, upbeat, and accommodating guide.  He is passionate about sharing his city and that is evident in the tour.  Prashant loves his city and it shows as his enthusiasm spills out.  One highlight is that he arranges the tour for local bus and train travel during the tour.   He is also very accommodating and willing to personalize the tour to see the sites most interesting to you and he is willing to take pictures.  Next time we are in Mumbai we will definitely plan to book with him again.