@paulasimoes It looks quite cool! Very minimalist, and the context-dependent formatting menu is neat. Great initiative, I hope they open more broadly soon or there will be hosted options.
But (at least at the moment), I don't really see what Docs does better than, say, #Cryptpad's "rich text" or #FidusWriter.
They did the (relatively) easy parts, as far as I can tell. The hard part is things like track changes and comments, or bibliographic references and Zotero integration.