The content is very substantial. Back in my undergraduate days, I couldn't understand anything without GPT, but I finally understood it after taking this course. The instructor feels a bit like a... robot, but the explanations are very clear! The lecture times are short, and the courses are divided by subject, so there is less mental burden in terms of cost and study volume. What's also great about this course is that they provide interview questions and explain how to practice. It's incredibly useful because it goes beyond just listening to a lecture and actually helps you prepare for real interviews. I plan to take other courses as well.