I was also looking at that model as I want a snapdragon.I have a redmi note pro 3 and im really happy with it.
I certainly will be looking at them for my next phone.
Are you using the stock miui rom?
I also noticed when looking last night that there is now a redmi note 4x with a snapdragon 625, altho it seems pretty expensive at the moment as I think it only just came out