I decided to try it out (I recorded my initial impressions here: https://www.youtube.com/watch?v=MdmB0JnNF3s).
The software itself is pretty slick. Currently we're using Crisp Chat's help docs for our SaaS, as well as a static site generator for our API docs. I think this could reasonably replace both.
One thing I really like is the layout. Having general topics on the left, as well as anchor based menu in each article is super helpful.