at first I quite skeptical to change/update ROM bust the stock ROM are sucks!
I tried Maclite first, http://forum.xda-developers.com/showthread.php?p=19883291 flash with Wellcome stock ROM and an update from Maclite itself. Basically the Wellcome ROM more stable from CSL. With Maclite, they ripped off unnecessary component in order to let battery survive. It felt like driving a new BMW with old 70's cockpit.

Later I tried Andro-Id, quite stable but the feeling quite static before port to MIUI. Battery was fair comparable with my iP4 (leave it after charged unused the battery will still drain within a day. I can say the most satisfied ROM ever used over FB0. With MIUI, it optimize the FB0 hardware capabilities. I use to underclock to 528Mhz and battery superbly can last longer. Also the theme wonderful