I am regular customer of paytm, I have compared all other shopping apps like snapdeal, shopclues, amazone etc etc.but I never found any product cheaper than paytm. I will give 10 out of 10 for product pricing.
Now talk about return policy. Believe me, returns are so easy and refund is too fast without any questions. Return product in morning, get your refund in your wallet in evening.
Delivery time is ok depending upon city you are living in.
My experience for paytm is 10/10. Go for it and enjoy shipping without any tension.!