It's so informative because it doesn't just teach you one way to implement it, but introduces several methods!! And it goes beyond simply implementing the basic behavior of UI elements, and it teaches you really detailed behaviors, such as the function that opens when you search with the accordion ctrl+F, and how to make tooltips appear on the screen. When I was developing a UI that I hadn't implemented before, I would follow along by Googling or YouTube, but after listening to the lecture, I got a sense that 'this UI should be implemented like this', and I think I gained a lot of confidence in implementing it. Considering the price, I think I can get a lot more out of it than other lectures. Part 1 was helpful, but I'm really looking forward to Part 2 after seeing the list of elements!!! It seems like the best lecture for junior front-end developers. Thank you for always giving great lectures :)