-Horrible, awful battery life. Probably about 12 hours. Hoping they get a fix out soon...
-UI is much smoother and more polished than Gingerbread (smoother animations, extra room to put apps on homescreen with the bottom bar)
-The new widget features are great (can add a homescreen icon to call/text a specific person, play a playlist, navigate/open a map for a specific location)
I love it except for the battery issues.