I don't play Pathfinder, but I've just ordered Kingmaker 1: Stolen Land from amazon.co.uk, the only UK seller I could find - "dispatch in 1-3 weeks" so I guess they ship it in from the USA.
This is a test purchase for me - I've bought lots of Paizo flip-mats, and been happy with them, but I've never bought or read a Paizo adventure before. I'll see how good this is, and that will help me decide whether to get into Paizo stuff, and this AP in particular.
If it *is* really good, I'll then need to decide whether to convert it to 4e D&D, use it with 3.5e D&D, or use Pathfinder itself.
Edit: I'll be looking for the kind of things I don't see in WoTC adventures such as richly developed NPCs, lots of PC-NPC interaction, plenty of freedom of action by the PCs, and a bit of drama/melodrama to go with the hack-and-slash.