I’m a regular customer of Amazon, they’re descent. They covers almost the whole India. Delivery is also nice. They use Gati, FedEX, IndiaPost, etc couriers and they’re pretty good. You’ll get a nice Return/Refund policy as well. At my locaton Amazon delivers almost every products, unlike other E-commerce sites they just delivering 15% products only. Amazon also put their product’s prices so low comparing to other websites. And the customer service process is very good. The special feature is Chat, You can chat to solve your issue and they’ll happy to help you.
I recommend, use Amazon and you’ll get free Prime features for 60 days(If you’re a new customer). Being a Prime member, you’ll get all the Prime signed products for free and fast delivery. So, try Amazon Prime, You’ll love it.