As most musicians are insanely stingy with giving away secrets as though they were magicians, it is hard to find those who are actually willing to talk about music beyond their aspersions that they know "things" that you don't. Instead, Russell bares his entire musical outlook.
I expected some dense music theory talk; maybe some perspectives on counterpoint or tonality. That's not what this is and I found something I didn't think I needed (but really do). His podcasts show him to be something of a musical psychologist, providing perspective and reflection. Sound unimportant? It's not. I'm binge listening to this stuff and I have to slow down so I have time to reflect, process, and apply them.
The best zero dollars I ever spent.