I used it a lot years ago, I can confirm it's extremely easy, both using it an customizing it, I haven't seen another editor making it so straightforward and easy to setup your own color coding for example (I used that a lot for dokuwiki pages), but I thought that project was abandoned at some point so I switched to codium.

I see by your post that it's still being actively developed, I'll give it another shot, thanks for sharing.

For what it's worth I recently moved from Wordpress to Grav and I'm not looking back. It's a web server and the editor is built in but it's all markdown and fast as hell. The file system is flat and easy to understand. I'm smitten.