I haven't run with Pathfinder Society before, but I have run games before outside of PFS; here's my foray into it, with the Free RPG Day Scenario, Master of the Fallen Fortress. This scenario is for 1st level characters that haven't been played before.
A dungeon-based adventure for 1st-level characters.
The ruined siege castles outside Absalom have long beckoned adventurers looking to make a name for themselves. Now an earthquake has cracked open one of these fabled ruins, and its lost mysteries and fantastic treasures lie exposed for the first time in centuries. But the tower's empty halls once more echo with living footfalls, and a new master has claimed the Fallen Fortress as his own. Can the PCs find a way to get inside its shattered walls? What ancient dangers and fresh threats will they encounter inside its crumbling chambers? And will the PCs be able to defeat the current Master of the Fallen Fortress?
Master of the Fallen Fortress is a dungeon-based adventure for 1st-level chararacters, written for the Pathfinder Roleplaying Game and compatible with the 3.5 edition of the world's oldest RPG. It also serves as an introduction to Pathfinder Society Organized Play (Paizo's constantly evolving, world-wide megacampaign). The adventure involves exploring an ancient, ruined tower and rescuing the captured Pathfinder held within.