-new swipe features to access music player, flashlight, calculator, camera, and some commonly used features (e.g., do not disturb, blue tooth, etc);
-itunes radio seems promising;
-3d/perspective thing under icons on the homescreen picture is kind of cool;
-new sms interface (minus keyboard buttons) looks nice;
-new siri interface is better than that shitty old one;
-new siri voice is ok, but maybe she seems a little too eager. chill out bitch.
not so sure:
-interface looks faded and bleached out;
-not used to new icons and new icons aren't very intuitive (at least many of them, to me);
-bleached out keyboard buttons make typing less certain;
-runs slow on my iphone 4s;
i'm sure there are some other things i haven't yet noticed considering i just downloaded it like 20 minutes ago. it's ok, i think.