I'm running it now with my group, and they are really psyked about the whole kingdom part :)
It's a really great idea, and with slight modifications you could actually run it set anywhere more or less.
There are some Stat errors on the mobs in the AP though, and the CR for some of the encounters are way off.
Without giving spoilers.
The to-hit for mobs in F. and G. are just wrong, with up to +10 in difference to the real to-hit.
And the CR for E and K are way to high, compared to what they actually face. I trippled the amount of mobs in E, and they still cut through it like butter, and I only have 3 players. While the P, which is only +1 CR, almost killed them, and they where actually lucky there. Thinking that one is actually a higher CR than anticipated.
Would be real nice if someone at Paizo looked through the AP, and used an hour or so calculating the mobs, to see if the stats are true, and then update the .pdf.
But besides that, keep making things like this :)