Read it, and followed the whole book through. The differences between 4.7 and 4.11 were pretty easy to deal with. However, I found the practices in the book to be sub par at best.
It describes the setting of the game being constructed as a tower where you fight your way up floors to the final villain. NONE of this is done in the book. It doesn’t even devise a system for random encounters with enemies. Instead, it relies on you running a console command to initiate “battle”.
I understand it might be trying to build a framework you can run with, but I don’t even think it does a good job of that.
Several of the systems you end up creating feel hard-coded. Especially the blueprint UMG inventory and equipment systems. If we were truly creating a framework to re-use or start from, then the code should reflect that with some easy to modify, modular code.