When I looked at other InFron lectures, there were three things that made this lecture stand out. 1. Above all, the high quality of the lecture 2. The instructor's continuous lecture updates 3. Feedback that is not too late (even though he has a full-time job, it is not significantly delayed) 2 and 3 may have limitations in updates or feedback as time goes on, but 1 - the quality of the lecture - was quite good in my opinion, having taken various lectures on InFron. I recommend it.