It's good for beginners to Spring Boot. First of all, I'm a 4th year student in the Department of Computer Engineering. I have experience in creating a REST API for my personal blog with Spring Boot, but I felt that I lacked the concepts of how Spring Boot works, Auto Configuration, etc. I tried to study with the Spring Boot reference around May, but the reference was so huge and it was in English that it wasn't easy to read. At that time, I watched Giseon's Spring Boot 2.0 reference lecture on YouTube.. But it took too long, so I gave up..ㅠ However, I signed up for this lecture because I thought it would save my time. It only contains the important parts from the reference, so it's cost-effective, as you said. (The lecture time is 11 hours, but you should keep in mind that it will take much longer if you listen while coding.) I personally recommend this lecture to college students. Thank you so much, Kiseon!!