Do it! go with an open mind an a sense of adventure and you will love the trip.
I've wanted to visit India for a couple of years and this trip definitely lived up to expectations. It's a chaotic, crazy, colourful place!
Listen to your guide.
Try and drink plenty of bottled water and definitely carry toilet roll, Immodium and hand gel/antiseptic wies everywhere.
Most of the group had had minor tummy upsets but we all carried on, maybe just easing up on the spiciness of the curries and opting for English dinner at times.
The trip is intense with lots of early starts and travelling but was well planned to cover all the essential sights plus we also experienced carpet making and printing in Jaipur, gem making, pottery and visited a school.
There is a lot of travelling to cover the distances often extremely bumpy roads which provide an endless source of entertainment but our driver and his son were brilliant and looked after us well.
The train journeys were a real experience, actually slept quite well, do pay attention to what your leader says, Harish advised us to lock all our valuables into our main cases and chain and padlock them under the seats to safeguard them which was great and reassuring advice, since some tourists in the carriage in front had valuables stolen whilst they were asleep.
carry small notes (10 and 20 rupees) to hand for the toilets and to give to people if you take their photos. be prepared to ignore the hawkers and beggars, they will give up and move on.
Be prepared to become a tourist attraction and for people to ask you to be in THEIR photos its a funny and surreal experience!