I am a redmi lovers since company launched its first mobile and yes it improve its quality and performance with changing time.
I am using mi note4 64 GB since 6 month now .
positive points:
little curved screen 4100mAh battery
Snapdragon 625, octa-core 2.0GH
2.5D curved glass13.9cm( 5.5) Full HD
supports 2g/3g/4g/volet
Dual screen feature
External pheriphels can be connected usin otg cable like mouse, keyboard, dslr, printer etc.
sleek phone with royal look( black and grey look royal)
negative:
over heat issue
camera quality disappoints if you are looking for photo or selfie part.
Application stop issue is also
Screen gaurd not available easily
Speakers are also not loud
Difficult to buy online.