Hello, thank you sincerely for your valuable feedback. First, I'm truly sorry that you felt this course didn't provide sufficient value. Although I put a lot of effort into preparing the course, since this was my first time creating one, there seem to have been aspects that felt lacking from a student's perspective. I didn't reference other courses and wasn't aware that most have unlimited access periods, so I mistakenly set a time limit. I will change this to unlimited access. I thought a lot about optimizing the time spent on VM, Zabbix, Grafana, Slack, etc., but since this is a hands-on practice course, there seem to have been shortcomings in those areas. I deeply apologize once again for the inconvenience, and if you have any additional suggestions or complaints, please feel free to share them anytime as they would be of great help.

Thank you for accepting my feedback graciously, even though my expression might have been rough since I left the course review while listening to the last lecture on mobile. I understand that people have different purposes for taking courses, but in my case, I've been working as a server developer for quite some time and only knew about monitoring efficiently with Zabbix and Grafana. Then I found myself in a situation where I needed to handle infrastructure monitoring in a small organization, and I happened to find this course, so I enrolled. When I first enrolled, I thought you had prepared a lot, but I started to have some doubts about whether this course would actually help me. In my case, I take courses on Fastcampus, Inflearn, and Udemy when needed, and I think each platform has its own style. I've always felt that Inflearn is more practical. I particularly like courses by a famous Java developer on Inflearn who creates detailed PDF materials and provides explanations based on those materials while not missing practical aspects. I think your course would be good for developers with no concept at all to gain knowledge like "Oh, so this is how it's done..." but I felt it was insufficient for immediate practical application. I ended up doing my own research and building the system separately from the course, which led to various doubts. I think I left the course review because it was different from what I expected, which might have been unpleasant, but thank you for responding so kindly. I look forward to your future courses considering more practical aspects.