Works good but makes conflict with the audio recorder. The audio recorder simply don't work.
If you use the audio recorder often as I use, here is an alternative solution:
Install Google Camera, root, add "persist.camera.HAL3.enabled=1" line in build prop and reboot. With this you will get additional features (API camera2) as manual focus in Google camera.
It's still not the ideal solution, but if you like to take good quality pictures it helps a bit.
I'm still hoping that miui make some advances in our native camera...