Thank you for the great lecture that can be called the Bible of Spring. I really enjoyed it. I usually study from books, but I can only study for about 5 hours a day. It was an interesting video lecture, so I was able to finish it in 2 days by concentrating all day. It was very easy to study with easy explanations and PDF (document) for me who is studying Spring for the first time. The only regret is that there was no lecture that creates an actual service after looking at the roadmap. For people who are new to Spring, including me, it is important to learn the core principles and know MVC, but I wish there was a lecture that ultimately applies what you learned while creating an actual service such as a simple community or shopping mall! Personally, I think that the Spring Core Principles - Basics itself is a perfect lecture without any flaws.