Well what should I write! There are lots of reviews out there, but I can tell you this is the best device at this price point.
Im using this device for last 6 months, there are some issues I would like to share with you.
Pros:
Battery. I travell a lot, and commute a lot. Use 4g when im outside, wifi in my home, still redmi amuses me with its performance. Im a avarage gamer, but heavy internet user.
Sound quality is good and decent.
Camera, it is awsome. HDR mode is not less than any SLR if u know how to shoot, selfies are decent.
Stylish, slim and sleek.
Cons:
After 6 months sometimes fingreprint sensor fails to respons.
Restarts sometimes if you fail any ota update.
There should be a fast charger. Charging time is long.