Forbes has been hit and miss lately. For every good article they do about tech, they do some short, sensationalist 'China is taking over' piece like this.
Comments from actual users of these phones would be far more informative. Karma to scott_karana for mentioning his experience with their version of Android.
MIUI is actually a fairly well-known (and used) Android variant. Fun fact: it was supposedly based on iOS' looks but branched off into their own direction after ICS. Since then, iOS 7 was (comically, IMO) compared to MIUI and people believed Apple was inspired by it. It was even sold on a phone that was very iPhone-esque: http://www.blogcdn.com/www.engadget.com/media/2011/08/xiaomi...
