MIUI9 brings in some fluidity, and some great new animations. Feels good and premium. Not much of an upgrade for Redmi 3S Prime and earlier users, since not much notable new features added. But compared to stock, there were already a host of good features in MIUI.
What we wont get (Lollipop and Marshmallow based):
Split Screen, Quick Swap, New Navigation Bar.
What we wont get (Lollipop and Marshmallow based):
Split Screen, Quick Swap, New Navigation Bar.