Even if you don't play the game (or never did play, or never plan on playing), this module is well worth the price of admission. Written in the same vein as the AB minis from Fleming/Giffen in the 80s, "Don't Ask" is a real gem. And, if nothing else, the back cover is a cut-out Ambush Bug mask, perfect for fighting rogue argyle socks with (if necessary).
The quality of the artwork is as high as its ever been for the Item Cards. While the order the cards are numbered in is a bit odd (I'm sure there's some rhyme and reason to it, but I've no idea what it is), it's very easy to sort the cards both by type (armor, weapons, potions, etc) and alphabetically.
Since this book was announced I just kept thinking that if it's at least as good as the 3.x Forgotten Realms Campaign Setting (I think easily the best supplement made by WotC for third edition), it will easily be worth the price of admission.
I've just spent two hours taking in the depth and scope of the book, and I'd already say it easily surpasses my hopes and expectations.
The Pathfinder Chronicles Campaign Setting is a classic.