I find this fellow's short demonstration to be pretty direct and informative. https://www.youtube.com/watch?v=ZzoCZQd ... LEjvZxqD3l
He has kind of cemented this notion I have that the chromatic keyboard is the way to go. Also interesting is that he seems to favor the "B" system over the "C" layout. I very much appreciate the major, minor, and 7th chord construction the way he has shown it.