renting i find pretty easy. The hardest part for me is the traffic and lack of rules i can not stand. I got use to driving on the "other" side of the street pretty quickly, but the BIKES! I drove in Mumbai, colaba to be exact.
But my suggestion is just rent a car and a driver. Saves soo much headaches, especiallly parking. Just make your driver sit in the car somewhere.
I have decided next time in india I will just rent a driver and car for my 2 weeks.