It's a very deep and difficult lecture, but it's really helpful. The explanations are very good, and the Q&A feedback is also very good. I'll have to read it again later :) Thank you. +) I personally wish the rest api lecture had come out first. These days, most people communicate with the API using json objects, and there's more to learn than I thought, such as serialization and know-how in rest api communication. And since you'll learn about login-related functions in MVC 2, I hope you'll cover Spring Security later! Thank you again for the great lecture.