Conversation

Anyone have a view on #GitBook vs #MediaWiki as a public way of developing a collection of informative documents, and presenting a view of a system (organisation, campaign, movement). Open to continuous collective (re)writing.
Look&feel of GitBook seems so much cleaner, MediaWiki typography IMHO is not pleasing.

But what's under the hood? What are they like to manage & maintain? How easy is it to put a different skin on MediaWiki?
GitBook costs, but offers a not-for-profit free option.