Hello, I started with the free lecture and now I am taking the 5th lecture. The most difficult part of learning the theoretical part of Spring that I thought was difficult was that I didn't know what to learn and how much to use it in practice because of the huge amount of content, so I was studying at a loss. I am really grateful that you covered all these parts, so it was so great. And what I was really, really satisfied with was that I was able to quickly review and focus on the class thanks to the lecture materials, so it was so, so, so great!!! I plan to take the lectures on querydsl and springData jpa in the future! Thank you so much!