My experience with Paytm has veen good till now. I have been using the Paytm mobile app for quite a while now. I mostly get my phone recharge done from here. It is fast and easy to use. The best thing is that there aren't any irritating advertisements coming in the way.
I have used it to order a few items too. I had to return one of it and they were quick in providing the cashback. They provide pretty good discounts and cashback offers. Overall, I would call it a feasible and easy way to shop.