I had high expectations after seeing the course introduction and star ratings.. I took the course because I was tempted by the star ratings and instructor introduction, but it was a course that fell far short of my expectations. Considering that it is a 50,000 won paid course, the content and structure are poor. You shouldn't just watch the video and follow along. You have to refer to the lecture notes, but the version is different from the video. It's not important, but the environment changes from Windows to Mac in the middle. It seems that GitHub, where the lecture notes are, is not managed. The instructor's response is also slow, and since all the star ratings were written in February, I think the work was done by people who took the offline course. It's a course by a professional instructor, but in reality, it's at the level of offline seminar live coding.