After learning Java in my undergraduate program and becoming interested, I took the course. It was good because it taught Kotlin concepts by comparing them with Java, and I could also indirectly learn concepts I wasn't familiar with in Java. The course density was higher than I expected, and studying by searching for related information online to organize it made it more memorable. Personally, I like courses that provide not only concepts but also future direction, so I seem to have enjoyed studying and listening to it.