WHAT WORKS: Um, most everything. Gorgeous book, very affordable print price, a ton of great examples as to how to tweak Savage Worlds to fit a setting without mangling the core of the system, the well-done Glory rules and a couple of Edges that I'm already planning on swiping for other games (how you doin', Tactician?).
WHAT DOESN'T WORK: While we get a basic overview of the land, we don't get even a few monsters, so you either buy the Bestiary, play with the selection in the corebook or use entirely humanoid antagonists (nothing wrong with that last one, mind you). While it's not unheard of for Savage Settings to extend past one book, fact is that most of them are usually playable either alone or with the rulebook, and Hellfrost really feels like it does need at LEAST the Bestiary to get the most from it.
CONCLUSION: Wiggy knows his Savage Worlds, there is absolutely no doubt. I am ashamed that it took me this long to pick up the Hellfrost Player's Guide. Even if I never run the setting, there's a ton of mineable material and system tweaks to apply to other SW games, easily. The product reminded me a lot of cracking into new AD&D settings back in the day, and I mean that as a compliment. There's a reason Hellfrost is so well regarded, clearly. One of the best third party products...no, check that...one of the best Savage Worlds products I've read, despite the near-mandatory three-book buy-in.
For my full review, please visit: http://mostunreadblogever.blogspot.com/2011/08/tommys-take-on-hellfrost-players-guide.html