Well, picked it up last week and I like what I've read so far.
Class wise, the new classes seem well thought out with my only reservation being for the Summoner and tracking all the fiddly bits of his "Pet". Not mind boggling, I've seen Druid/Rangers in the same boat so I'm going to wait until I see one in action.
Conceptually I love Alchemist, it plays as a much more reasonable take on the gadget caster. I absolutely love the Inquisitor and plan on playing one in the near future. The Cavalier seems really fun and works a LOT like 4E's Warlord in 3.X terms.
But as a GM and player I think the meat and potatoes of this book is seriously in the Class Archtypes. I know this concept came up in 3.5 PHB2, but Paizo's take on it is very easy to understand and it makes me giddy thinking about playing some of these class varients. It also does away with a LOT of 3.5 need for Prestige Class glut.
I think maybe this syncs with Pathfinders take on Prestige Classes more for hybrid builds, or extreme specialists. (Or setting specific builds...)
New gear, magic items were run of the mill but the expanded metamagic rods listing is welcome.
The new Feats...are interesting. I think I need to reread more of this section to digest what options I'm getting. Same with the new spells. I'm going to see where in play these would be useful. A lot came off as specialist fill ins, or tied to the new class roles. The new metamagic feats are good, but some make me want to test them out for abuse potential.
Overall, I love the book. I know Utimate Power/Combat are on the way next year but APG pretty much fills in the lion share of the 'other' options.
What is your take, if you got it?
Haven't had a chance to take a look at it yet, but I will.
My thought is that I really, really want a copy. :)
But my wife is out of work, so no new book for me. :(
But someday, it shall be mine!