This add-on is uniquely and especially helpful for those who want to capture information in a structured manner within posts of a thread, as we do. I think those who need it will appreciate how powerful it can be for certain use cases and workflows.
Helpfully, this add-on is also implemented in such a way that it feels native to XenForo - and leverages the exact same field options that exist for custom user fields and the like.
I did encounter a bug with the add-on when I first installed it, but the developer was very helpful with respect to studying my observations, investigating the problem, and ultimately releasing a patch to address.