Great adventure. The quest to rescue the chidren was interesting as was the info on Falcon's Hollow and some of it's residents. Fun touches like the drunken hill giant, the encounter with Jeva, and the intro story about the kobold make this one of my favorite adventures.
I picked this up most of all because it was part of the Pathfinder RPG and the artwork is awesome. I find it a very useful tool as a GM because I haven't GM'd in a long time and this book offers lots of useful advice and ideas.
Paizo's products for 3.5 were some of my favorites for that system so when I heard that they were releasing their own system based on 3.5 I knew I would eventually pick up a copy. I do not regret paying the fifty bucks for this product. It is familar enough to 3.5 that you don't have to spend much time learning the rules. The changes to the classes and races are really cool, the bloodlines for the Sorcerer class being one of my favorites. The artwork is great, some of the best I've seen in a long time.
The only complaint I have is the binding is already wearing out on my copy and I haven't had it that long. But that's not really a big deal to me. It happens.