I'm using it. The docs leave a little to be desired if you're customizing (they just released a new major version), but you can customize and replace the rich t

I'm using it. The docs leave a little to be desired if you're customizing (they just released a new major version), but you can customize and replace the rich text editor with your own, add a preview button, add a deploy button, etc. If you want a wordpress replacement though, there will be a big learning curve as it's a general-purpose CMS, not specifically for blogs.