To be honest, I'm not sure how widely this is used. I haven't met anyone else using it yet. Personally, I find it particularly helpful during test case discovery because it's a fast, structured way to come up with the first version of a test plan.
I suggest you try it out during one of your sprints to see how it works for you. I got it to run on an older version of Java without issues. Let me know if you need any help setting it up.