1. Considering that the lecture difficulty is intermediate or higher, I think it is a very appropriate or even easy level of difficulty. I think most intermediate learners will be able to search and resolve errors caused by version issues and such. 2. Also, since the importance of docs was continuously emphasized during the lecture, it was fun to look up parts I didn't understand on my own. The explanations were also kind. 3. I learned a lot from the fact that he explained well why and how to use Nestjs using examples from his practical experiences and situations. 4. I learned a lot from the live Q&A part for each section. I want to participate in an actual live lecture next time.