Jerry knows bass. He knows technique, he knows theory, he knows gear, he knows music history (past and present). Most importantly, he knows how students learn bass and thus he is able to tell you what you need to know and what to practice in oder to improve.
Jerry immediately found the holes in my technique and gave me a few lessons in bass theory that I hadn't already figured out by trial-and-error and applying theory from other instruments. He gave me exercises to work on to improve my chops and get my playing to a higher technical level. He taught me about the intricacies of the bass instrument and the gear associated in creating bass tone. He gave me songs and bass players to listen to and play along to in order to get the basslines I wrote sounding more mature and appropriate for the style/genre of their songs. And all the while he would immerse me in the culture of bass. Turning me on to the history of the instrument, the evolution of how it has been played through the years, the different styles of playing and how they fit into each genre, and of course the great players of the past and present. His body of knowledge around bass is just staggering.
I'd been playing bass for fun for about 10 years at jams and also for about 6 months in an americana band. I'm also a serious keys player and know my music theory solid. Then I started playing bass in a funk/soul band with more technical players and realized I needed to develop some serious chops to keep up. I chose Jerry because he wasn't a guitar-player teaching bass, he's a died-in-the-wool bass player who had been teaching for years. I wanted a specialist, not someone who was going to teach me basic theory.