My personal opinion of the book is that its the greatest waste of paper to ever come out of WotC for D&D. There's some good stuff in there (
some of the monsters, the feats and classes) and a lot of dross (the entire chapter on cards, the reprinting of the Skirmish rules...).
The classes are interesting, although playing a Healer or Marshall is an exercise in boredom. Both of them have no real class features to make use of in combat other than to buff their party, although they both fill flavourful niches for world building. Especially a Marshall. The Favoured Soul is great, and the Warmage, while on paper is BORKEN, is anything but. They have nothing other than high explosives
![Devious :] :]](http://www.enworld.org/forum/images/smilies/devious.png)
.
The feats are by and large interesting, especially for military based games (dovetails nicely with Complete Warrior in that respect). The sudden feats, once again, seem broken at first glance, 'till you realise that they're once per day and eat a feat slot. Sorcs make excellent use of them though. The one exception is Mage-Slayer; as has been said, its better than an EPIC feat!

Someone at playtesting was asleep at the wheel. That or thought "This is so kewl!"
The monsters fall into two categories for me. Cool or "What where they thinking?!" Kruthiks, Nothics, Aspects, and Displacer serpents are all cool. Catfolk, Cruicians (AKA The Walnut People), Walking Walls, and Magma Hurlers all come under "WWTT?" The Magma Hurler in particular has a low CR, yet can easily vapourise a party with its Magma globs! What the heck is going on there?
Ultimately I say this: its an alright book, but there is no way in heck I'd pay what they're asking. Half-price, maybe.