This app used to be great, but as of late, it's gotten frustratingly annoying. My writing partner and I use docs to collaborate on stories, share documents and proof each other's work. In the past week I've gotten the same "Cannot sync your changes. Please copy your changes and revert" three times. When I revert, it can no longer open the doc and the only fix is to uninstall and reinstall docs. No major name app should be this buggy.