What I found most valuable in Smartsheet is its project customization feature. It's a great solution because you can add in your own WBS. You can see it in Jira style, Kanban, and you can even do Agile and Waterfall.
Another feature that's valuable in the solution is when you have those connections, you have that API, you have a sandbox, and you can make a solution, it's a tremendous product because you can pull data.