To be honest, I purchased this with high expectations, but I was quite disappointed. Seeing the title 'Harness Master,' I expected to learn more than just simple feature introductions—I thought I would learn how to deeply apply concepts like Claude.md, Skills, Hooks, MCP, and Plugins to actual projects. However, after listening to it, the content was quite far from what I had expected. Most of the lecture followed a format of summarizing information available in official documentation or on YouTube into PPT slides and then explaining them. While this might be helpful for beginners, as someone paying for a course, I constantly felt that the "So, how do I actually use this?" part was missing. The lack of depth was particularly disappointing. I was curious about things like why Claude.md is important, what criteria should be used to design Skills, and how to integrate MCP into an actual workflow. Instead, a lot of time was spent on feature introductions and listing concepts. Rather than gaining new perspectives, it felt more like someone was just reading the official documentation to me. The hands-on practice was also below expectations. I expected step-by-step guides or example projects for the practice sessions, but in reality, many cases consisted of just a few screenshots and brief explanations. There was a lack of guidance on what to build, where to start, and why it should be done that way, making it difficult to follow along. Personally, the most regrettable point was that the lecture didn't feel like it was leading the learner. A good lecture includes explanations like "This part is difficult, so try understanding it this way," "Most people get stuck here," or "This is how it's used in practice." I hardly felt any of that experience-based guidance in this course. In the end, after finishing the lecture, only one thought remained: 'With this level of content, wouldn't there be much difference if I just studied on my own by looking at official docs, YouTube, and asking AI?' 50,000 won might not be a huge amount of money. However, what's more regrettable than the money is the time. I invested several hours with the expectation of learning something deeply, but I didn't gain the insights or practical know-how I had hoped for. For those considering a purchase in the future, I recommend thoroughly checking the curriculum and sample lectures first to see if they match your level of expectation.