I just played in the Chaos Marauders Event at Gen Con and it was a blast! It is definitely a beer and pretzels game, and I mean that with the highest adoration. Fast, simple and chaotic: it's everything a game about Orcs & Goblin tribes battling for supremacy should be. All of us enjoyed ourselves and can't wait to play again. It's simple enough that I will be teaching 9 & 12 year olds to play. The classic GW artwork is a blast from the past. The production values are typical high standard FFG.
A word of caution though, it is a given that you must play the game with a sense of humor. The chaotic nature of the gameplay can make you king of the hill, and then strip you down to nothing. I know firsthand.