I've taken about 3 lectures now.. I think the instructor already knows.. The audio quality is so bad that it's hard to understand the lecture.. Instructor.. You know? And.. It's fast.. It seems like you're progressing on your own.. People who are trying to study object-oriented for the first time can't hear well.. The speed is fast.. This is.. Well.. I can't concentrate. But how did all the students who took the course give it 5 points.. To be honest, I don't understand.. Can you all hear this well? It's so hard to listen to the lecture.