The rules are extremeley clear. We've played several times with friends (using the backer preview). Explaining the rules takes about ten minutes. You have four key card types corresponding to story cards you place on the "board.
Attack and Investigate cards add a set (or variable, by dice rolled) number of Hits or Clues to Foe and [mystery] (can't remember the name now) cards. If the set number is collected, you remove the story card.
Overcome and Take Advantage cards work on a 1:1 basis, you play them on Obstacles and Advantage story cards to remove them. Obstacles limit your options or modify your rolls, Advantages allow for additional card draws or give some other bonus.
And that's about it. Every card has a certain range you have to take into consideration, and a cost of Fate Points you have to be careful about, because all players share the FP pool.
The challenge lies in communicating with the other players well enough (without giving the specifics, though new stories we play with giving exact numbers) to remove as many foes and [mysteries] as possible. If the number of Foes remaining on the board remains grear or equal to the [mysteries] solved, you lose the scenario.
It's very simple, and it's more of a board game than it is a card game, and definitely not a CCG.