Hi Brian,
As an RF engineer, I depend on Smith charts for the intuitive understanding they enable. It is easy to look at at an impedance and instantly understand what would best match an impedance. It's easy to visualize what effects rotation through a transmission line would have, and pretty much how complicated a matching network will be, before ever designing it. It's invaluable, in my opinion. Just my 2 cents worth. Glad you found it easy to implement.
73,
Dean W8ZF
