I have been using S2U2 and haven't had any battery drain like everyone else is describing.
I went from 100% to 70% yesterday with normal calls and texts. I like it, but I may just have to see what PS is like since everyone else likes it.
This is off S2U2's website under FAQ (
http://s2u2.ac-s2.com):
Q. S2U2 consumes a lot of power?!
A. Make sure there is no music player running in the background.
A. Use digital clock without showing the second.
A. Don't use GIF wallpapers.
A. Don't use a folder of wallpapers.
A. Turn off "Show Appointment".
A. Turn off "Show Weather".
A. Turn on "Don't use Keyboard Hook".
A. Turn on "Ignore screen orientation"
A. If any "auto-rotation" application is installed, add "S2U2" to it's exception list.
A. Disconnect the data connection.
A. Update to v2.14 or later.