This is another must-have expansion for Eldritch Horror.  The new characters alone are worth the price of admission, with a couple of them now being regulars in our games.  The new mythos is tough, and so far we've been close but unable to defeat.  The added encounters are all a nice surprise and add to the variety - as do the new items, spells, unique items, etc.  Also, a nice touch is the addition of all the palces of power, such as stonehenge, which really adds a new twist to the concept of expeditions.  If you haven't gotten Mountains of Madness, then you want to get this set to pick up the new Focus action and tokens which adds another options for your characters.