I have and have had no detrimental issues. I've played around with News, but can't decide yet if it's better than services like Zite and Flipboard. There are a few minor details they've made easier, including automatic notifications (on the lock screen, not an alert) on how long it will take to get to home or locations on my calendar with a traffic update. It's nice to be able to add an attachment to an email from the native mail app. I haven't hit any bugs yet.....but I also haven't really taken the time to explore the new stuff yet, this is just what I've seen in normal, routine use.