WHAT WORKS: The writing takes care not linger too long on any one place and painstakingly drive it into the ground. There are some great plot seeds if Hellfrost isn't hampered with a metaplot (I haven't read any of the adventures yet, and there is no plot point campaign). This book runs fairly light on the art, which means there's a lot of setting material inside the pages.
WHAT DOESN'T WORK: I like extra crunchy bits, so I'm not quite as "Wowed" with the Gazetteer as I am the Player's Guide and the Bestiary, but that's just me. I caught an odd typo or two, like "Grey" and "Gray" being used for the same location within a sentence of each other.
CONCLUSION: While Hellfrost has a very central premise, the Gazetteer does a really nice job of establishing that the evil in the realm is not monolithic, meaning that there is more to do than just fight one bad guy and his minions. The Gazetteer gives you enough information to run with most places that might interest you, and they have a ton of microsupplements to "zoom in" on a given location if that interests you. In fact, if the setting only had the three books I just reviewed, it would still be a strong, fleshed out setting...but Triple Ace Games has released an amazing amount of support for it since its release. For me, I would place it near Midnight and Ravenloft among RPG fantasy settings (and I mean that as an extreme compliment). If, like me, you're a Savage who passed over Hellfrost in the past, you should probably rectify that.
[4 of 5 Stars!]