Pretty much the exact same experience here. I just removed my wife's photo storage from Google completely as of this month 🎉. Don't even need the security blanket anymore. Immich is it.
I had a mini panic when moving from v2 to v3 was not automatic today, but it was a 15 minute fix, that was mostly just reading the step-by-step instructions for the update. Copy-pasted a handful of lines and we're off!