Having played about a dozen times now, we've lost a couple of the games, with a few wins being veryyyyyy close to raising “he-who-shall-not-be-named”.
As with all random games … the dice (and card) gods will decide! The odds are certainly in our favour, but we've found some games have been won because we forgot the Mythos card effects (i.e. monsters at midnight, no spells, etc), the adventure card terror effects, locked dice, etc … so keeping track of what's going on across the table can sometimes allow you to win.
I doubt if many people would buy the game if it was too hard, so it always a balancing act for game designers to find that … equilibrium … to keep it challenging for us plebs.
I personally luv this game because of the whole package … storyline, cool images, cards, textures, counters, etc … luv it! AND with the expansion … well, let's see if it adds more fear to the unbelievers! … Walts