Played at GENCON and it was my first time playing this type of cooperative adventure.
I liked the idea of it, but it sure was frustrating to not complete the majority of the encounters when it was time to move on. The plot twist was very cool, and kept things moving quickly as the night waned on.
It would have been nice if our GM would have explained how things worked in the beginning. Once we sort of figured that out on our own, we were all disappointed when our Table GM didn't report our success in the one encounter we actually finish quite early. We even asked if he needed to report it or something; to which he reply don't worry about it. Which definitely killed the enthusiasm for us. Perhaps in this sort of setting the HQ folks could actually do a quick primer for the newer players to let them understand how their actions impact the overall story.
The content of the encounters itself was quite varied and interesting, and also very challenging (played on 5-6). I felt it was harder than Bonekeep (lvl 1). My 6th level Pally, at full health was nearly one-shot at one point.
Overall I liked it, but my overall experience was impacted by the execution and I can't really give it more than 3 stars.