XDA posts report battery drain probs but dont see any reports here;
http://forum.xda-developers.com/show...60#post4635360
confirmed that the ms3config tool still works on 3.5. Many of the widget mods are dead in the water for now.
http://forum.xda-developers.com/showthread.php?t=523329
For 3.0 upgrade just download the 3.5upgrade and install. It will keep all your settings other than the aftermarket widgets. Ms3config rework is required to change prof panel backgrounds and get your 9 lifestyle pages back.