I really like how easy it is to exclude the listings that I don't wish to view or favorite. And then view or favorite those listings I chose to do at a click of a button! Super easy to do on my Android phone too! And it's free! I can launch an item in my shop as long as I have the appropriate amount of credits.
I like how easy Seller Tools has been to schedule. It has helped me quickly get things out to social media without much thought. I like that you can choose how far apart you want your posts as well.