I had been using only Notion and managing my notes randomly. As my accumulated notes became dead knowledge, I was worrying about how to manage them when I came across Obsidian on YouTube. However, I kept procrastinating because there were too many customization features, until I found this Obsidian Master course. After applying the ACE framework—one of the PKM methods introduced by the instructor—I already feel like managing my life has become much easier. I think this lecture shines just as much for the value of the ACE framework as it does for teaching how to use Obsidian. Thank you so much, instructor, for providing such excellent teaching that is worth many times more than the cost of the course!