Personally using this phone mainly for gaming purpose.what a phone Adreno 505 gpu .best in its range no lag on high end games.
Played almost all 3d games and High end games.
Also I play psp and ps games by using ppsspp emulator .seriously no lag.
When it comes to camera it was awesome before update and when I updated to latest miui 8.5 it became super awesome.now fingerprint capture has been added to camera app.
Must buy phone.I personally recommend it.