Very handy if you're already familiar with the system, but probably a little opaque for newcomers. The fact that the arrows aren't labeled (much less explained)

Very handy if you're already familiar with the system, but probably a little opaque for newcomers. The fact that the arrows aren't labeled (much less explained) is a bit of a let down. You kind of have to guess at what each arrow means and why. This as an Ilograph would be amazing.