I've using Standard Notes for almost three months already. It's neat, but "standard editor" is kind of weak (like not supporting tab to indent), I have to try using the extended editor. Everything syncs nicely BUT on two occassions a tag got duplicated with some of the notes. I have no idea how - but at that time I had it open on two desktops. Not sure how nicely the encryption is done. You can create your own server for notes too!