Before taking this lecture, I had read a Spring basics book. There were quite a few things that I didn't understand, but I think I would have learned more and in more depth if I had taken this lecture and read that book. I think this is the best development book or lecture I've ever seen. The explanations are really easy to understand, the voice is nice, and the tips such as stories from actual work and IntelliJ shortcuts were really useful. I was completely absorbed in the lecture and had a lot of fun listening to it without getting bored. I'm currently a job seeker studying to become a backend developer, and I got a lot of motivation thinking, "It would be great if I could meet a senior developer like Younghan in the future." I'll work hard to follow the remaining lectures!! Thank you for making such a great lecture :)