The content is really good, but when you lecture, the text you input in Jupyter Notebook is sooooo small... I think my eyes are going to pop out... Isn't this almost 6 or 5 font? The PowerPoint is refreshingly large and small in font, but when you actually show the text you write on your laptop during the lecture, you make it so small that people with bad eyesight might get sick from looking at it. It's a fly in the ointment. In this great lecture, every time I take my glasses off and put my face in front of the screen, it's quite absurd. Um.. And I'll add one more thing. Since this is my first time at Inflearn, I paid a lot, but I realized that there is a huge difference in understanding between taking this lecture and taking other lectures and not taking other lectures. In my opinion, I would strongly recommend that you take Python Basics and then this lecture and then other lectures, especially if you are interested in stocks. After taking Python Basics, this lecture seems to be the best for organizing concepts about Pandas. I wish they had made the font a little bigger in other lectures.