I´m a subscriber since Kingmaker 1, and I´m totally happy with it. I live in Germany, and I get the AP modules within ten days to two weeks after their release. It´s the fastest way to get them here. Sure, there are shipping costs, but you get 30 % off the cover price.
The adventures are of top quality. Paizo does a terrific job. I´m a fan, really.
Richard Pett has done a tremendous job. I really love this adventure. It´s the perfect finale for a great Adventure Path. "Sound of Thousand Screams" has so many great ideas in it. It´s varied, terrifying and wonderful - it´s simply great. 5 stars out of 5, no doubt about that.