Very good approach for Keez for Piano, and Approaching the Lead Sheet. Both courses offered practical useable information. The Penatonics course is not as useful. It so far (3 lessons) has been playing a pentatonic scale, with the instructor and a metronome. The accompanying fingering chart is only for the right hand. The instructors state to find your own fingering which for this is not helpful. To develop control, speed, dexterity and power for scale like playing the the fingering is critical. Almost all of the success of rapid playing depends on developing useable fingering for both hands. I found another book to help with pentatonic scales specifically which devotes a lot of time to the fingering. It has been more helpful. The pentatonics course as you may deduce for me is not helpful. I don't know if /when I will do another course from Open Studio. I will keep looking though at the options.