I understand that the teacher is working hard and that the content is good, but the boring part (concept lecture) is really, really long. I don't think people who dream of being developers will take the GAS lecture, but people in other jobs will take it for self-development purposes, and they listen while thinking, "So what if I do this..?? What can I do???" And that content comes out very late... I think it would have been a little better if they had inserted visualized examples here and there. People like us need to feel a sense of accomplishment right away.. In conclusion, it's a lecture like herbal medicine. I know it's good for the body, but it's really bitter.