I am wondering at what price will they launch the RedMi Note?
As for the build quality, as far as Ive read in all the sites and heard from friends, Xiaomi phones are some of the most solidly built phones, and the Mi3 in particularly very well built.
As for the MIUI rom, I personally am happy about it. In the times of gingerbread, it was the only good looking rom one could have, with very smooth animations, all the themed settings, the toggles in the status bar, everything (including lockscreen, dialer, toggles) changing with the theme, it was unbeatable at the time (though it needed more resources to run than cm).
And cm before ICS, though was smoothest, was still ugly compared to miui. Also, miui had the best dev support with weekly releases.