I dont have any links to live examples, maybe one of the community members will step in to provide a link to a sit they have used css menu writer on.
The css menus are created using pure css, with minimal javascript, this means they do not have any special efects like sliding down, they are intended as pure css menus.
you can edit the menu after it is created using menu writer to add images or create the mega menu, but they are not supported by the wizard.