I think the editor is valuable if: 1. is responsive and lets you think visually 2. doesn't break bootstrap's model, so the output is similar to what a human would do. This means that you should have control over ids and classes and generally know the html structure of the components. 3. lets you extend bootstrap's components with CSS,JS,HTML 4. lets you create new components in a similarly modular way 5. plays nicely with server-side/front-end templates (mustache/erb) 6. talks with github so the changes you make can eventually be merged in (feature branch, pull request)