I am using this phone from last 18 months.i can say it worth every penny I spent on it, great processor, screen, interface, all in all great experience.
But xiaomi is really lazy in providing android updates as MI3 is still stuck on 4.4.4 kitkat. Even marshmello is out for some of the phone but we mi3 user’s still on obsolete android update. If xiaomi wants to survive they shouldn’t over look old phone even they called it a flagship once.
But I must say phones doesn’t lack in any section except it’s software.