I thoroughly enjoyed the SwiftUI Apprentice eBook and completed every page in both HIITFit and Cards (coding, not copy/pasting). Both apps were wonderful to code and learn from.
When I got to RWFreeView, I paused. Naturally, this is an educational book and the API, JSON and HTTP info is valuable. But the topic felt too specific to RW, which made me hesitant to continue as I could not figure out a practical use for the completed app (e.g., a new app building on the model app, which was so evident in HIITFit and Cards).
I would have preferred a Core Data app, or JSON for a more general app (i.e., weather, movies, locations), but realise this is a personal preference. As value-for-money, HIITFit and Cards justified the price of the eBook, so all is well. Thank you to the RW team.