I have been introduced to snapdeal 9 months before by one of my friend. I bought so many deals from snapdeal and found their customer support very helpful.
They really care about their customers and try to resolve any issues and grievances in a short span of time. They send timely reminder mails about the deal expiry by SMS.
They do exchange the product in case of any issues. The quality of the products is also good as compare to other online websites.