Well I have been using this phone from the last 1 year. Initially for the first six months everything was superb except the camera.
But ever since we got the Marshmallow update and the subsequent updates from Xiaomi the battery life has taken a huge hit.
Now I can say that this is still a OK phone. Sound reception is good, performance is OK, battery backup will last you 1 full day with moderate usage. If you are planning to buy a phone at this price go for redmi note 4.