To clear a few things up for others who haven't read or might be curious. If you are rooted and update works and goes through and installs. You will be unrooted and your phone will show that the lock on boot and say it is custom. I only can assume that is anything that modifies it including safestrap. So if you want it to be official then flash the mf3 files via Odin to restore to default and then update.
I noticed that when I updated it took away my ability to hide apps. So any apps that I had placed as hidden on 4.2 are still hidden after the update but I cannot unhide them. Now you have the option to disable or uninstall.
A few new apps are installed with this update. What I noticed was Samsung play games updated, lookout security, at&t mobile locale, and Amazon Kindle apps have also been installed to add more bloatware.
Few people I have seen talk about it and in my apps list for all apps it does list ant+ plug in and also Knox.
Regarding the update I can say it is running fine for me so far. The default brightness is increased it appears. I haven't gotten into battery life just yet as I charged it to full to get a better test. Everything for me is running smooth and in my case smoother than 4.2 was for me.
Edit: Almost forgot with this update you do lose the data toggle. It is not listed on anywhere that I could find. So if having a data toggle is a deal breaker to you then don't update.
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