First of all, the advantage is that I can study by referring to frequently used methods and problems in various documents. Also, I liked the format in which the explanations are divided into two languages, JS and Python. The next disadvantage is. I paid a few months ago, but even now, I can't fix the typos, which can cause confusion when actually studying. Also, there are still numerous feedbacks and answers to questions. The problem format also feels far from a real coding test. You have to be able to clearly state the output and code, but most of the problems are in the form of 'Find the answer somehow', 'Uncover the secret', so it is very difficult to solve on your own. It doesn't fit my study method of first coding and then comparing it with the instructor's code through the video. The audio in the video itself is too small, which is also inconvenient. Lastly, it doesn't matter if you upload the evaluation itself by holding a course review event, but I think the course review itself will go up if you first improve the quality of the course and the document itself and accept feedback to improve the problems.