I haven't had a chance to use the rules recently, but I used the rules originally for Kingmaker (basically I replaced kingmaker rules completely as they were poorly explained).
I also used them to do several small narratives where I wanted to see how a nation in a pathfinder nation could arise, once for a kobold nation which I tracked for the first 50 years and another time for an island nation which I tracked for 250 years (though this one was mostly for practice).
I planned to use to sue the rules for a small campaign where the heroes were an incompetent noble's advisors, he would basically leave all to them and just train resources to live in luxuries. The game itself was to be centred around a small outpost the marked the border between the kingdom and three different hostile wilderness. The heroes would need to grow the outpost deal with local trouble, whims of the noble, external threats and pressure from the kingdom itself.
I used the rules to help me build up fantasy maps to populate them and make sure there is enough stuff to make it a bit more balanced. Check the economy by applying the rules have helped me get a better sense when world building. It has also helped with getting a feel of the scale.