I had the same issue as above, it rebooted and said installing, then it hadn't actually updated. Just unenrolled and enrolled again and downloaded.. again!
The PIN on boot can be disabled by changing lock screen security to swipe. You can set up PIN security again, just say no to PIN on boot.
The "System UI Tuner" has some added options as well now.
What happens of you unenroll from the beta after 7 has installed? Does it try to put you back to MM?
No, because when you in un-enroll it rolls you back to the last stable release and since this is a stable release and not a beta you stick with it.
Will it wipe the phone anyway when you unenroll? Or will you just get left with your upgraded 7?
Issue happened again. Found this: https://code.google.com/p/android/issues/detail?id=210429
Going to remove all do not disturbed rules (even though I never used them) and see if that helps.
My original Type-C to Type-C cable died.
Anyone knows where to get a good quality one without having to rob a bank?
A braided one would be cool because I love the look.