My experience with paytm is good. I always recharge my mobile and bill payment through paytm. Paytm gives good offers and cash back. I bought many products from paytm and they delivered on time. And products was good. Recently I bought my Lenovo k3 note from paytm and they delivered me only in 2 days. Before the date of delivery. It is good.
According too me its a very good online retailer company.