I haven't finished the lecture yet, but I think it's a good enough lecture, and I'm writing it in advance because a pop-up popped up on Inflearn asking me to write a course review. First of all, as the course introduction says, it uses TypeScript, but you can think of it as a React, Webpack, SWR, Emotion, and Socket.IO course. If you're taking the course to study React + TypeScript, you might be a little disappointed. On the other hand, even if you don't know TypeScript, there's no problem taking the course. However, I recommend the All-in-One TypeScript course, and I think it's a good course for those who want to study React + TypeScript while also using TypeScript. First of all, since it's a lecture that's faithful to React, it's good for setting up React structure and development direction. Second, it tells you the initial settings of Webpack and starts, but even if you don't know it, you can still develop, but since I think the initial settings are really important later, the content on the initial settings was really good. Third, it was good that it suggested which units to create style components in when applying styles and proceeded with the class as is. Lastly, it was good to give basic explanations and tips on socket communication, but I can't give you a definitive answer because I'm listening to it now. The downside is that, in my opinion, it's been a while since the lecture came out, so there are a lot of changes in the code. However, since they are consistently uploading updated codes to GitHub, and if you have any difficulties, you can ask questions on the Inflearn Q&A board or Slack and they will answer quickly, so if you want to study on your own, you can sufficiently supplement it. I'm listening while reflecting the contents of GitHub react-query in parallel with the lecture contents, and I was able to search and solve the contents that changed due to library updates. Lastly, as for the lecture listening tip, for the initial setup, there are some changes, so instead of following along, copy and paste the GitHub code, listen to the lecture step by step, and try setting it up on your own, I think it's a good idea. Also, since it's a basic lecture, if you're already using React and TypeScript well in practice and have experience applying socket communication, there may be less content than you think. Personally, I gained a lot from it, so it was a good lecture experience.