at what speed should the pcs level?
is this written for fast or medium xp chart?
It's written for fast, but if you're adding your own materail (as my GM is), then medium or even slow (but that might be painful at low levels) would do.
If you want to add a lot of your own materail, I might suggest slow after the second "module" of the AP. At that point everyone should be at a sweet spot.
ty
It's written for Fast.
I'm running mine campaign at "Medium," and I'm supplementing the AP with a lot of extra material. I've found several of the Season 4 Pathfinder Society scenarios particularly easy to insert into the play. I've also written several of my own side-quests that tie into the main story.
Have fun!