Does anyone have the adversary decks? They seem more useful for the GM.

I bought some. I don't have any need for them as GM - they're all PC talents. My NPCs and monsters all have their abilities in their stat blocks. What they're really for is so that players can quickly see what they have and easily put down a card saying what the effect is.They're pretty good for what they are - nice art, nice quality. Not at all necessary to play the game though! I bought them because I have one player who really struggles with numbers and character sheets and well, anything mechanical in the game, to be honest. I thought having four of five cards in her hand would give her an easy way to see what her special abilities were and get a handle on them. It doesn't seem to have made much difference, but it works for everyone else and I think they're good.

Actually, he asked about the adversary decks, which have cards with stat blocks for NPCs.

Oh, my bad. I have no view on those. I expect they're as nice as the Specialization deck but I have no use for those. I write out all of my statblocks before the game on my clipboard.

They are good for when your players go in a direction you did not expect. no flipping through the book fo stats.