Red mi note 4 is a great device.with premium metal almuniam body.
Pro.
A) For gaming go for note 4 because snapdragon 625 octa core processer is really fast and working without any heating issue.
B) 4gb ram waw.its pretty smoother.for any kind of apps
C) miui 8 one of the best os.in android.go for it because it is too smart and faster.
D) price is very less according to device features
E) and battry life amazing.one of the best phone of this era about battry life
Cons.
No fast charging supoorts.charging time take approx 2.5 hour.
Camera is not good.colors are not realistic.otherwise ok if u dont want potography.
No screen glass protection.