When considering value factor, xiaomi offers on par with the most "value for money" brands like leeco and Meizu, but no one can beat xiaomi in battery life. Mi5 had best battery life in all flagships except s7 edge. Mi5s plus had best battery life among all the flagships announced last fall. Redmi and redmi notes are the king of the Hill with their 4100 mah batteries. And Mi Max is also the king of battery life in its class.
The battery life decreses with the first official Nougat builds. I have Global Dev 7.23.3 and it's no match to Marshmallow rom in the Global Stable. I guess it will take some time to iron out the roms with Nougat to get it on this level. But overall for this money, it's a really solid device. My 4x doesn't seem to have that much of a difference in coloring the plastic part, so it's not an issue.