This is a super useful extension for those that work with Smartsheet a lot. It will start to pay off more and more if you're making complex solutions, or if you're maintaining a large amount of sheets with many users. So far, the most useful parts for me were hide/unhide and the automation/conditional formatting copy/paste buttons. However if you're a developer, you'll love the easy access info sheets with all kinds of IDs, and if you're making text heavy content, you'll appreciate the spell checker. As a huge plus on the personal level, the developer of the app was responsive and helpful when I had a small issue. Definitely worth the small investment.