Hello, Younghan! I started studying in July of last year, and after 1 year and 4 months, I finally listened to all of Younghan's lectures (except for the boot lecture). While listening to each lecture, I decided to listen to DB Part 2 and write a proper course review, and I'm finally able to write one. When I was feeling lost studying development as a non-major, I think I was able to grow by listening to Younghan's lectures. I worked on several projects through the lectures, and studied the CS I lacked through study. I will tell you about the characteristics of Younghan's lectures, who listened to all of Spring and Jpa's lectures. Let me tell you about the characteristics of Younghan's lectures. In order to learn the 5 steps, he teaches you step by step from step 1. If you know step 5 without knowing steps 1-3, if you learn steps 1-3 through the lectures, you will know why step 5 came out like this. I always listened to it without knowing, so I was always amazed when I saw the code evolving, thinking, "Technology has developed this much." (The reason there can be new technologies is because there are technologies from the past.) And I think that it is more effective to watch Younghan's lectures multiple times. For example, if you listen to the Spring Basics lecture, then the Spring MVC lecture, and then listen to the Spring Basics lecture again, your perspective will be broader than when you first listened to it. That's why I think I listened to JPA Basics 2-3 times (because it's difficult). For those of you who are considering Younghan's lectures, I hope you read this article and think about it. Oh, and lastly, thank you so much for the supporters' QnA answers! Whenever I didn't know something, I always solved it by Googling or QnA. Good luck to you all. Thank you for reading the long article.