Today i upgraded 100D, 50E - no issues so far.
As i noticed before was one issue with 60F today, but exactly i don't known the reason - probably ISP problem. Now just looking for (on 60F model i use: SSLVPN, dynamic routing like BGP or OSPF, few VPN tunnels, SDWAN, multiple secure profiles, VIP, NAT).
This weekend i will upgrade another 60F, cluster of 60E models, 30E, FG-60E and FWF-60E and maybe FG-300E.
If everything will be ok on next week many other models...