I love how easy it was for me to create new pages with minimal effort! There are so many great features like analytics which helps you understand your visitors better than ever before.
It also makes things easier in terms of managing multiple sites from one dashboard instead of having separate dashboards or apps installed separately across different devices/computers etc.. The only thing i dislike about them at this point would probably have more to do with their customer support rather than anything else but they've been very responsive when we had issues over there recently (and even since then). We use sanity mainly because our website has hundreds if not thousands of unique page views per day & sometimes its hard keeping up wth all those stats without using something automated.