Bought this smartphone in the first amazon flash sale, the dark grey colour and I have to say this is a perfect phone for its price.
The hardware provided is top quality whether it is build quality, processor, charger quality and the finger print scanner.
The fingerprint scanner is blazingly fast. It is faster than that of Iphone 6!. My friend have one and this phone has the faster finger print scanner among the two of them. The metal body is also of top quality. All the ports and buttons looks premium, the capacitive buttons have decent light and feedback.
UI, MIUI is awesome. Lots of features are provided. There are lots of apps pre installed but most of them are useful, not like other indian companies who preload their devices with lots of useless apps. The screen is a 1080p screen and its decent screen for the price. My sister have a MI4 and I think its screen is more brighter. And the camera is also very good, in daylight and outdoor shots there is a plenty of detail in the pictures but in indoor or lowlight situations, the camera struggles alot.
The only problem is that when a big game is loaded in memory, it will take 1sec extra to go to home screen( May be this problem is because of 2GB RAM model.