I'm not a frequent user of Amazon.in but occationally I used to buy things from Amazon. I'm one of the satisfied customer. The product range is huge and if you have time you can select the same product from a vide variety of manufacturer.
You can also order products like pickle etc. And this service is I think only available in Amazon. The service is superb. If the product is not satisfactory the company replaces without any complications. I personally prefer Amazon over others.
But for offers and coupons other online companies are ahead of Amazon.
