I am a Happy flipkart customer too. In fact, I only buy books through flipkart now since books are usually costlier through regular shops. And flipkart is fast too. Unfortunately I have only had bad experience with Infibeam. They twice showed books "in-stock" which were out of stock and when I ordered from them, instead of informing me about the unavailability of the books within the promised delivery time, they did nothing at all. I had to email them several times in order to get a response from them.