Our Sanity instance needs little introduction, out of the box it's set up to deploy to graphQL, has support for pages, products, and product variants.
I also add some global configuration objects for the sake of showcasing some of the extendability of the system. We're also using the Tabs plugin which allows us to organize our Studio experience. I wanted to have the ability to put common repeatable elements like our Meta information into a tabbed experience.
I will be rolling in additional features to the Sanity experience like: Panes, Previews, and potentially Google Analytics support of some kind.