As an RPG veteran, I found Hellknight Hill to be a letdown. It may be fine if you are a newb, or new to Pathfinder, but to someone who's been around the block, it's average at best. The plot doesn't really make sense, the behavior of the Hellknights who lived in the citadel is not logical, and it seems like every decision in-world is made to benefit the PCs. Add onto this the SJW culture embedded in the module and worlds and it's just not believable. It's like playing a fantasy version of 21st century Seattle ultra-liberal politics. Goofy and weird. Alienating to long time players like me. Not recommended.