Flipkart is really the best online shopping site and far better than other sites such as Amazon, ebay, etc. The best features:
Timely delivery, COD
Discounts and cheap rates
Products are rarely out of stock
However, when there is a festive sale, Flipkart is unable to keep up with the large customer demands. The products are sold early each time and go out of stock. Also they sometimes do not provide full depth or information about the product features.
Still flipkart is a better site than the over-hyped Amazon. I have ordered many times and never even once received a fake product.