I benefitted from all the courses I opened to watch. See Rachel, found many missing links tho, but got workarounds/fixes within a day or so of each notification to her, which was great. Sound quality and speed of presentation and in some cases, lack of materials with the J Piano Method Course by Peter were not up to your later vids standards, I realize these are older, the info was good tho. Re speed often makes references to other concepts pretty fast, luckily I was familiar enough to follow, and where no materials available, stop to make notes of new tidbits as needed, but not everyone in that course--even uf level 4, like I am, would be able to work at that speed. Cleaning up the sound if poss. would also be nice on those. I am returning to playing after a very long layoff, so familiar with most of the topics and just reviewing, found some good tibdits new here and there or reminders tho. I have been using OS on YT and get your emails for GPS and You'll Hear It podcast, was waiting for the Parks course release to get in for that and other courses, knowing that much would be review for me. Thank you for all you do, keep up the good work!