I haven't watched them all yet, but from my perspective of having purchased several React lectures, this lecture is the best. Other lectures must have been created by experienced JavaScript developers. However, there is a problem. Experienced people give lectures while already having an image of how the code works in their heads. So, they give lectures while writing code like Uncle Bob. However, for beginners, it is frustrating to just follow the code without being able to visualize what is happening at all, and it is difficult to even grasp the concepts. In this lecture, before the code, the concept is explained by first visualizing what happens when a certain function is used, and then the code is shown, so I also get an image of the code working in my head while looking at the code. Most instructors are developers, not educators/education majors, so I feel that there are too many lectures being mass-produced without a standard for this effective teaching method, but this lecture is really the best. I have already purchased TypeScript before I have even watched the entire lecture. The quality is good, but the lecture fee is too much. I even bought the book so that I could have another cup of coffee. I don't often use the expression 'thank you' for lectures that I pay for with my own money, because it feels strange. Nevertheless, this lecture is 'very grateful'. If possible, I think it would be good if you also give lectures on Express.js, Next.js, and TDD!