Works well; it's the best of the note-taking add-ons.

Small annoyance: There's no turning off the built-in spellchecker, except once, on the screen as you're looking at it. Next time you open the page, your notes are there but spellchecker is on again, so any word that's not proper English will have annoying squiggles under it.

No way to report this, except signing up for a github account (and spam) and jumping through captcha hoops, which, enough already.

Good add-on, though.