The best part of this lecture is that you can quickly learn only the core parts. If you think of it as saving time looking for materials rather than helping you understand them well, you can be satisfied. (That doesn't mean the lectures are not that good.) It covers most of the major CS theories, but it's a shame that there are often parts that are missing. (CPU scheduling, normalization, denormalization, partitioning, transaction isolation levels, etc.) If you have plenty of time, I think it's a better choice to study each subject separately and learn in depth. (Even though it's a lecture aimed at people who don't have much time in the first place..) Personally, I felt that the price of 165,000 won was a bit expensive, so I gave it 4 stars.