I have used it several times when presenting the stuff we have done at my current job (i.e. show how we have grown from a 2 person startup to a 15 Engineer shop

I have used it several times when presenting the stuff we have done at my current job (i.e. show how we have grown from a 2 person startup to a 15 Engineer shop). Undergrads like it a lot. The only thing that I think it is missing is having a "size" of each node to represent the size of the file. That will give a lot more visibility on changes.