I'm using that right now for both TODO and notetaking. I have syncthing set up so that it syncs my vault across 3 devices (including my phone). Very easy to set up (tho admittedly also easy to mess up the set up process). Have had minor hiccups the past 5 months but nothing that would make me want to stop using this setup.

All this is free. I feel like I've found a gold mine that nobody else seems to know about.