Installed 14385 in less then 30 minutes as usual this afternoon. System Restore was off again and needed to be turned on. I am using the Logitech MK520 with the Unifying USB device and am not seeing any problems. Mouse works as always. Now to create the ISO and run Disk Cleanup and then reboot. All looks fine.
Update for my problem with my Logitech mouse. I completely uninstalled the Logitech software and mouse. After rebooting the computer I reinstalled the latest Logitech software and it seemed to have fix my problem.
The touch keyboard still doesn't appear automatically at the lock screen. Works OK at the login screen but not the lock screen.
I quit insider updates after the 1511release, a few months later went back on the lowest preview updates. After reading the threads on the last 2 fast ring updates I got itchy fingers and went for it.
Download was fast, arond 5 minutes but install was painfully slow at 35 minutes (still I suppose I had a lot to catch up on).
Now installed and seems to be fine, just a bit of personal tweaking to do