Well I have been the customer of Flipkart for almost over 2 years. Purchased over more than 10 items. and satisfied with almost 8 items till now.
When should u Go for Flipkart -
When u find a huge difference in Price go for it. For an example, if u find a camera which cost about Rs.3000 on flipkart but costs Rs.5000 at shops, Check with the retailer reviews and go for it.!
Why should u go Flipkart -
1) Low pricing when compared to other online shops and at actual shop.
UPDATE - Currently even Amazon and ebay offer low pricing. This is comparable. I mean, some product are high priced here and some are low.
2) Fast Shipping on select Sellers and quick delivery as promised with them. Basically the sellers Labeled "Flipkart Advantage" have fast shipping.
UPDATE - This was till last year, but now only a few sellers like WS Retail have fast shipping.
3) Because they offer COD for all products they sell.
4) Good packaging with most products and no chance of missing any Accessory inside the package like invoice, handsfree, etc. If Invoice is not there, they will mail you on request. UPDATE - Now they have introduced the instant billing system as of 2015. Also now they send Invoice only through email for most of their selling.
5) U only get "Brand new" Products on flipkart. NO USED PRODUCTS at all.
6) If u want Product on Same day(Only for Select Cities, Select sellers and Select products) and on next day.
What Flipkart can do more -
They should allow the products to be opened and checked by the buyer right in front of the courier guy and then only should receive the payment and get sign for the product. If the product is good, Buyer can receive. The Product is not as expected Which includes damages, Loss of Product, etc, buyer can return the product back to courier guy and claim for replacement or refund. This process can not only save buyers from getting into unnecessary problems but also will save couriers time and money, as they don’t have to come back for pick up the product to be replaced. This process can also increase the Flipkart’s reputation further more.
If they miss the promised time of delivery, they should call up the buyers and ask for grace time. For an example, I got the sms for Flipkart stating that "My product will be delivered before 7pm", but they actually made me to wait for 3 more hours and got my order delivered by 10pm. Due to this, I missed an important obligation/event. They could have called me up told they would be little late.