Very nice supplement with plenty of NPC. Great as a backup material to flesh out small settlement or big city without bothering with pre-game preparation. I would definitely use it in my campaign!
more in detail...
Dwarf Battlerager: Nice brawler with some berserk like abilities.
Dwarf Curate: Divine spell caster, useful to populate temple and shrines in dwarf stronghold. Probably a more powerful version would be also useful to represent high priest.
Dwarf Elite Guard: Probably too powerful to represent even normal Royal guards, but excellent as lieutenant or city guard captain.
Dwarf General: One of my favorite, with minor quirks could be useful also to represent noble or other high born characters.
Dwarf Soldier: Second best, perfect city guard or common soldier, even if some more armor or a shield would have been nice
Dwarf Tunnel Rats: This one is the least useful as is written. Only the Keen Hearing feature is not enough in my opinion to characterize this scout-like character.
Dwarf Warpriest: Sort of cleric-warrior, with good flavor. I would have liked more another divine spell caster of higher level without martial ability tough
Dwarf Yeoman: Common dwarf folk, just when you need a not so important dwarf NPC stats.