Was in my friendly (not so) local gaming store, and they had 1 copy on the shelf, SNAG!
Tons of new cards! Only 8 new encounter cards for each color (purple, green, orange) and only 4 new generic encounter cards. 6 new expidition cards (love them, never have time to go after them!). 2 new mysteries for existing old ones, 6 for Yig, 24Yig clues so 16more clues for existing old ones. Yig has 8 special encounter cards, C'thulu gets 2 new special encounters, Yog gets 10! new special encounter cards! Go Yog...
Do not know why, but the cards feel slightly different. Dunno, maybe its just the voices... Lots of new artifacts, many let you spend sanity to buy off conditions in game, or other effects. More conditions with new flip effects, got to love them and a few new spells (healing!), as well as old spells.
Awesome value for the price, imho. Now if my store would only !#$%^ restock #4 card sleeves!