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I had to edit this course review for the third time. First of all, the course content is not up to date. It appears to have been produced for another platform and then recently registered on Inflearn, but looking at the topics covered and the production year of the course materials, the content is outdated. Furthermore, the course fee changed multiple times in less than 20 days, dropping to one-tenth of the price and then increasing more than tenfold. The official response claims it was a mistake... However, the timing of these changes seems heavily influenced by the previous reviews I posted. You can tell just by looking at when the changes occurred. Especially when comparing the duration and price of other courses by this instructor to this specific course, it is highly suspicious that the price was manipulated just to spite the person who left a bad review. That aside, the course content isn't even good. The instructor flip-flops between claiming to be a non-developer and a developer. The level of prompt engineering is stuck in 2022, and it's hard to believe the claim that over 500 people achieved results through this course—especially with a 20-minute VBA lecture covering VBA, Apps Script, and Python. It feels like nothing but gaslighting. I am a non-developer myself, but I possess a fairly high level of knowledge in data and machine learning (including deep learning) theory and practice. While I cannot know the instructor's full capabilities just from the lectures, I am deeply concerned about whether they possess the knowledge and qualifications to be an instructor.