1. The difficulty level is set to beginner to beginner, but I think it is a higher level lecture than that. 2. Although it explains the overview of MVVM, there were some parts that were a little difficult to understand for someone who is just starting out. It would have been better if it had explained the structure by connecting RxSwift and MVVM and making a diagram. (Of course, there is no lecture that makes you understand 100%, and there are parts that students must study, so there may be individual differences.) 3. It seems that you need to have some prior knowledge of Collection View, and the code and structure explanation for sections/layouts were a little difficult for me to understand. 4. The part where you configure the view with Snapkit instead of storyboard is very, very helpful. 5. It seems like I only listed the disadvantages, but in fact, I don't think there is any other lecture that is this useful and covers this much depth. This is a lecture that anyone who understands iOS development to some extent should definitely take. + Review after one month First of all, I listed the shortcomings above, but I learned about SnapKit in this lecture, and I am confident that I can compose any view and screen, so I am cloning and coding with SnapKit. If you don't have any ideas right now and want to study, listen to this and try cloning an existing app with SnapKit... It's very helpful...!