In my personal opinion, I used this phone for 8months it has no issues till now.
Battey life is good.
No heating issues.
The camera is average but not bad.
Overall MIUI experience is very decent and friendly.
The fingerprint sensor is also awesome.
Sound quality is also good but not so pretty.
Now It got Android -7.0 update and it has many features
Awesome build quality.
In my opinion, you have to go for it.
It has 3 variants like 2gb, 3gb, 4bg .
So far I am using 3gb-32gb gray edition.