Parking is very difficult. You may visit NS Road for a task and return without it done just because you did not get a parking. Believe me, it happened to me. So if you have a driver he will somehow keep the car at some place while you get the work done. Also keep a driver as driving here is very stressful .
Abrupt lane changing is the norm.
Floods occur easily. If you are buying a new car don't be tempted by words like 'josh' and 'zip'. Forget about that 90 bhp car. The top speed record is highly irrelevant. You can never exceed 25kmph in traffic and 50kmph otherwise in the city and the car is always in 2nd gear.