Me and my husband mostly buy mobiles and electronic gadgets from flipkart.com only, it is a trustworthy site to buy all this kind of stuff.
Earlier I bought my first micromax smartphone from flipkart then in between we ordered lumia 545, after that xiaomi red mi note 4 G(which I am using at present) then my husband purchased samsung grand mobile and after one year he bought mi4i from flipkart only, in between we bought power bank and cables from them.
I never faced any problem till now, also their deals are very good sometimes specially in their sale season.Although I would not recommend to buy apparel and stuff from them, some of my friend had bitter experiences regarding quality.
but I am a happy customer of flipkart so far.