MIUI is nice, fast and better battery performance but limited features and limited android apps can be installed and run. It's fully customized for performance and nice UI (theme).
What turn me off is, MIUI do not have native maps application. You can use web base maps application. If you are happy with that, it's ok, but not me.
For user who would like to try most of the available app in the market such as Google+ it's not recommended.
Uninstall MIUI and back to darky DEODEX.