Hey I own an iphone 6s , space grey. using it from last 3 months. the product is obviously overly priced as I bought it for rs63000 and a month after price crashes to 48000. the only feature I like is the camera quality. the hands free siri is of no use as it doesnt recognise indian language. power back up is as normal as other range of iphones.
The usb cable will not last for even 6 months and it will cost you rs1200-1500 if you buy from apple store. so if you are spending your money try for other options too unless you are not brand freak.