After taking the React course followed by TypeScript, I found the instructor's diction and vocalization so good that it was easy to stay focused, making it a very pleasant lecture to listen to. When I was self-studying TypeScript, there were many concepts that didn't quite click or parts I couldn't grasp, but this course was a huge help as it covered everything from the core principles to advanced applications. Compared to other courses that just focus on building toy projects and writing code, I think the biggest strength of this lecture is how it helps you understand the underlying principles easily. :)