I love this book
the Lonely Planet guide to India is THE guide. Going to India with the Lonely Planet changed my life. It also tells you to leave the guide behind and follow your intuition. I did. The result was my new book, on how to travel with your intuition and change your life. Travelling Magically: How to Turn Your Journey into a Life-Changing Experience. Quite a few stories about my time in India there - I wouldn't have missed it for the world.

Buy another book
I was one of those people who took lonely planet books everywhere, all over Europe, to Iceland, the Philippines, Cuba and now Delhi. I trusted the brand so it was the only book I brought, big mistake.
I'll only speak for Delhi because thats where I spent two weeks. So I hope this specifically helps travelers to Delhi.

The restaurants were pretty much awful, the hotel prices were wrong, the massage treatment place recommended so out of the way that it cost the cost of the massage to get there and back. I was working so I only wasted my weekends following the book. My work lunches were at far better restaurants and a aimless walk in the daytime in Old Delhi was far better than any guided tour. I also didn't appreciate the tone of this book and how much time it wasted on smug reviews and lame humor.
I think the individual country books depend really on the authors/editors, the other lonely planet guides I have were of great help. For India(or Delhi at least), try another title.

Very Informative/ Large Book for Large Culture
It is large and heavy but full of information and easy to fine that information which many guides books can't come close.
Lonely Planet, you do a good job.

first time visitor, long time LP user
While I only ever purchase Lonely Plant books for my travels, this new edition had me a little disappointed with no inclusion of HiTech City as one of the sights to see. The city was truly amazing and I am thankful our driver thought to take us there.

No Country for One Book
While this is a perfectly adequate guide, should you travel to India, I would recommend also bringing along the Footprints Guide, which does a better job describing various monuments and historical places. I'll be heading to S India in a few months and plan to take this guide, Footprints AND Rough Guide (I tore the N India sections out of my older Rough Guide and Footprints as these are three hefty books). India is such a huge country that no one of these three guidebooks stand out as being the best. If I had to take just one, I'd probably go with Footprints, but their latest edition is a bit dated for proper hotel and restaurant recommendations. The LP is the most current of the three mentioned.