I have begun working through the "Elements of Jazz Piano" course and find it to be an immensely helpful set of tools for intermediate-level pianists to improve their skills in a systematic way. There is a lot of material in each lesson if you choose to pursue it thoroughly, and I look forward to seeing how much my own playing has improved in a year or so, once I've internalized much of the lessons. I also am a big fan of Peter's 2 minute jazz videos on YouTube; they provide plenty to work on as well. Overall, this is a great packet of materials, and the high-tech format facilitates the learning process. Thanks for all of your work in putting this group of lessons together! (Note to the site manager: please keep my comments anonymous, or simply use my first name and country of residence: "Mike, Japan")