Another Gitbook user here. For me, it&#x27;s the simple markdown syntax, nice diffs in GIT&#x2F;SVN, tooling, exports to HTML&#x2F;PDF with plugin possibilities and minimal vendor lock-in.<p>That said, the preferred tool in our company is still MS Word. Fortunately I&#x27;ve managed to adapt Gitbook output to look pretty much the same as output from our Word template.