/e/os on a Fairphone 3 for a few months now. It's my first custom ROM, and it's been a breeze so far :)
Some quirks that I don't actually mind : when the phone is turned off and charging, the animation on screen doesn't update the current battery level (but idc, usually the phone charges at night), the phone calls volume is really loud (but I usually plug my headset in for calls) and the integrated vpn is sometimes slow enough to cause websites/apps to timeout (I can live with that).
I still have my old android phone mainly for my bank application.
Edit : typo