Hi Daniel, Welcome to AIO #1!
Sorry I missed your post from May 17 (I typically keep my eye on this thread).
I have enjoyed the Alfred All-in-One method. I think it has been great for my development. As far as progression in terms of time, that is hard to say. I have supplemented this method with several different books; so it has slowed me down in terms of completing pages in the book. If anything I have taken on too much. But on the flip side, by doing many different things, I have really worked my fingers. I have been very happy with how I have approached self-learning the piano. Honestly, I am amazed at how quickly all of it has come together. For where I am right now - I am still a raw beginner - I am very comfortable at the keyboard, well except for the pedal part.
For me, "Blow the Man Down" did not take long to get; but that is because I learned "Ach Du Lieber Augustine" (from Alfred's All-Time Favorites) first.
The other material that I have worked on includes:
Alfred's All-Time Favorites - excellent supplement to the method books, but starting to realize that I do not enjoy the some of the arrangements, I may move away from this book
Alfred's Greatest Hits - similar to the All-Time Favorites
Keith Snell's Essential Piano Repertoire - using for finger strength development, phrasing, dynamics, and dexterity
Alfred's Masterwork Classics - just purchased, first impression is that I like it better than the Snell book
Martha Mier's Romantic Sketches Book 1 - using this for pedal development (submitted a recital piece from this book)
So after all I have said, I have been thinking of putting everything aside and just finishing the Alfred All-in-One book. I am not sure. I try to practice several times a day in shorter intervals. So I tend to enjoy working on different pieces.
This turned out to be more of an autobiography than anything else; sorry about that.
So Daniel, keep us updated on your progress. Feel free to share your work and any tidbits you may discover while on this journey.