jimsam I've switched from iPhone to GOS about 2 years ago for a daily driver phone and it has been fantastic experience. Almost everything works well out of the box.
Some buggy apps need disabling secure app spawning. There are some odd bugs here and there but nothing critical and I haven't used stock Android for a very long time so can't compare to it. Examples of odd bugs:
- Bluetooth earphones in secondary user profiles stop working (both sound and mic or just mic), it happens very rarely these days but still happens
- Occasionally home screen becomes blank and you can't swipe up to bring the list of apps
- Rarely, new SMS won't show up in the default Messages app
All issues like that get fixed with reboot