Overall, it's a decent course, but the price is on the high side, so there are some disappointing aspects considering the cost. Aside from a few disappointing points, it's a good course, so I'll only mention the disappointing aspects. 1. There are some parts where code is missing. You added supplementary lectures for the missing parts, but even those supplementary lectures have missing sections. 2. Very often, after modifying code, you click on another cs file and move on within 0.1 seconds. When you copy-paste and move quickly, it's easy to miss things entirely, so when errors occur later, I have to go back and rewatch the lectures to find them. 3. The frequent impromptu code modifications are confusing. I think you should prepare a bit more before recording the lectures. Also, because the code is modified spontaneously, there are some parts that remain unmodified and left as hardcoded sections.