I think it may be decent, but the homepage is not convincing me.

I had a tiny little look, and don’t like that I had to log in (although selfhosting seems to be possible since very recently), and then had a weirdly full notebook. It also seems like they don’t save their data in nice little markdown files, but use some custom database-stuff.
They probably allow exporting into markdown, but I’d prefer it to be stored in a legible format.

Overall, I had a look, and I’ll stay with logseq + syncthing