Good update overall, but there are a few things I dislike, or will at least take some adjusting to. Mostly with the notification bar...
For one, I'm not a big fan of the gray notification bar. I liked the ICS black. It also seems to be a little less....smooth when pulling it down. I'm not saying it's laggy, but it doesn't feel like it grabs and drags as fluently as it used to. I also am not liking the time stamp that's at the top instead of the actual top part of the notification bar so we can see the little icons of what's on. It feels a little more cluttered to me instead of opening it up which I think was the intention. And I wish there was a way to turn off the brightness setting. I like it in theory, but I use a third party brightness app, so I never even touch those settings, so again, it's just cluttering it.
Also for some reason when I hit the home button to unlock it goes straight to the home screen instead of my widget locker lock screen. It used to go to the lock screen, which I use all the time. I've looked everywhere but can't find a setting for this. Any ideas?
Overall it seems to be a standard upgrade. Battery is maybe slightly better if not identical, camera updates are nice, the new Swype is accurate as hell (just wish you could change the look), and I can't wait till GoogleNow is more personalized. Hopefully I'll be able to actually use Wallet sometime soon and I guess there's still more to come so we'll see!!!