For instance, you never need to enter a name twice because you can search for it and double click it to use it. It provides balacing information when you edit a child diagram.
Global change is easy, one change make all instances changed because it is integrated.
Diagrams and the dictionary are integrated. Information in the dictionary is consistent with the diagrams. All things are manipulatable in a diagram. If you move a process, all lines that connect to it are dragged with it in real time. You need to see it to believe it.