I had taken Multicore-nim's Reinforcement Learning for Programmers, and when a new reinforcement learning course became available this time, I decided to take it again. Since RL is such a challenging field, I had difficulty understanding it because I couldn't find a course that suited me. Multicore-nim's course was a ray of light for me in that situation. Now, seeing RL frequently mentioned in related research papers and technologies, I think I made a really good decision to take the course back then. This course is very helpful to me because it explains practical, real-world examples well. I don't think there's another RL course in Korea as good as this one, so I highly recommend Multicore-nim's course.