I haven't completed it yet, but I feel good about it, so I'm leaving a review! Pros: He's gentle, unlike other instructors Although it's a ktor lecture, it contains more content about backend development than I thought, but he explains it calmly, so I'm following along well. I personally think that Kotlin concepts like lambda and receiver functions will be helpful for project development later, so I liked the part where he gave the lecture in the beginning, And while I was making a coffee menu service, the instructor's experience? I liked it because it felt like a good tip here and there. -- Cons: It seems a little slow when I listen at 1x speed, but it was just right for me when I listened at 1.5x speed Since the subtitles aren't included in the video by default, I'm watching it with auto-generation, but sometimes I get confused because there are parts that don't match.