As an "intermediate" pianist, I took the "harmony games" course, and the material was good, the lessons were interesting, but there was about 15 seconds of video to repeat for each chord change, where they have the rhythm section. I appreciated the sheet music notes and the workbook, but I really wish there was a seperate backing track, even if it was a midi one, just to practice each of the concepts in time with rhythm, ideally in every key. The course moves very fast if you're not already a rather advanced player who picks up new concepts impressively quickly. Having said that; for 27 dollars it was a no brainer.