Here is my review:
The delivery is really fast. Although I m not belongs to any major city.
The packing is really good, no chance of damaging.
Various payment mode- You can also pay by card after the product reaches to your hand.
Tracking facilities- you can track down your order to see where it is right now.
SMS service- You will be notified by early morning in the day of delivery.
The courier boys are very much cooperative.
Price is little less compare to the other e commerce sites.
Flipkart app is very good.
The only con is product quality. Be careful with your order. For example I purchased few T shirts & Mobile back covers but the quality is not up to the mark. Look at the customer reviews before your order.