I don't regret buying it because I can learn the flow of the plan, the words used, and the plan structure, but I feel disappointed because there is no lecture. Personally, I think that since I can still get something, this price is reasonable. Since the lecture is just reading the lecture notes, I feel like I bought the lecture notes instead of the lecture. I barely understood how to create a data table by listening to YouTube... I think it will be difficult for those without basic knowledge to listen.