I bought this guide for a recent trip to India, visiting Goa, Hyderabad, Kerala (Fort Cochin and Alleppey)and Mumbai. I usually buy two guides and the other I bought was Footprint's India
India Footprint Handbook (Footprint Handbooks). I was attracted to both because I like Footprint and Lonely Planet but also because they had just had a recent edition come out Sept 2011 - in my view recent is always good in travel guides.
I think this guide says it is the South India section from the Lonely Planet India guide. It appealed to me because it was a bit smaller and easier to pack than a second all India guide.
We liked this guide a lot, it has small maps, useful information and brilliant recommendations for where to eat. We tried many of the Top Choices and they were all interesting places to eat.
The maps were good and gave us quite a good idea of where to go and how to get there but weren't completely accurate and left us a bit lost at times. We were usually able to work it out but it is a bit frustrating. The guide wasn't as good at providing information on the historic sites and museums as the Footprint India guide.
We were very happy overall with this guide and would recommend it.
BTW my friend bought the same version for their Kindle and we didn't find it as useful - very frustrating, because you feel that Kindle editions of guidebooks would just make travelling so much lighter. Mostly I think we were struggling with finding things, we could flip through the book but with the Kindle edition you had to guess at how things were spelled.