I am using this online service paytm since two years and must say it is the best in the business. Search any product whether mobile, laptop or even car freshner you will find all there with best rates.
I always compare all the online sites like snap deal, flipkart and amazon before buying any product and most of the time paytm gives the product at minimum rates and also it has cash back facility which is the key. You get discount plus paytm money from which you can buy any product available on paytm. Delivery time is also punctual.