Amazon has a ultimate service right from place of an order to delivery, with superb message updation in every movement of good and seevices. It takes very less time to deliver a product and most imp it takes only hours to refund you after picking up the product if you have any issue with it. Possibly it is difficult to match amazon as of now for others e-commerce websites as it is coming out to be father of all e-commerce websites as it CEO is even beating Mircosoft giant in terms of money. Thumps up to amazon.