One of the best things about Mingle is its visual metaphor. You can set it up so that it looks just like your story wall. Of course, you can create multiple views, so that you can view the cards in whatever ways you like, using various sorting and grouping options. I also like that I can drag and drop a card from one column (Development) to another (Testing) and have certain triggers fire to change data. While this was lacking in early versions, it's there now and very valuable. Overall, I find it easy to set up and configure, and easy to use.