Greetings,
v1.2.0 was released in November of last year. If there were issuses, you would have heard about them by now. This FW includes 6 fixes/feature enhancements. As far as the R5 and 6 goes, I would take anything Canon is offering that improves their performance or reliability. I'm sure its quite safe to apply this update.
~Rick
Bay Area - CA
~R5 C (1.0.9.1) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, ~RF 200-800 +RF 1.4x TC, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve Studio ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8 ~CarePaks Are Worth It
