What makes it different from your average boilerplate is that you can customize your tech stack and UI before exporting your code. For example you can choose between Material UI, Bootstrap, or Bulma for your UI. Firebase or Auth0 for auth, and so on down the stack.
It then runs your app in our built-in editor where you can play with styles and drop in new components from the Divjoy library. The idea is to give you that "Aha! I'm building something and it works!" moment right away. That's a better experience than spending your first few hours sifting through docs.
You can try all this out without signing up or paying. Just head to the site, pick some options, then a template.
PS. You may remember my original Show HN from over a year ago (https://news.ycombinator.com/item?id=20688044). The 2.0 version takes that concept and expands it from mostly static sites to full SaaS apps.