Let me divide my review into pros and cons
Pros:
1) Flipkart has a large number of products of wide variety and the price is same or lesser than offline products.
2) The customer service is good, they officials reply to ur email quickly.
3) The shipping speeds r quick and next day delivery is available in select pin codes
4) Many latest products r released on flipkart like mobiles etc
5) Flipkart offers r great and a wide range of products are discounted
Cons:
1) Some products may be advertised as 50% off but the rate of the product is same as offline product.
2) Sometimes the information of products is wrong.