I imagine any extract recipe could be done in this manner. For example: Rye PA, American Wheat, Heffeweis, Milk Stout. The only difference would be to use the corresponding extracts, spec grains, and yeast for each category of beer desired.
I know 15min is an eye opener for many folks that need to brew but often can't becuase of time constraints.
Awesome to hear of success with this method.