The scripted demo they put together for Gamescom was buggy as hell, forcing them to re-start the scenario more than once, to the point where the live "players" would repeat the horrible dialogue they were role-playing to make it seem "immersive". There were so many crashes and glitches and clipping issues, at one point near the end of the demo a player-driven ground vehicle clipped right through the ramp it was trying to drive up, and it exploded.
And this was a self-contained LAN version of the game with only a few live players in one instanced setting, that they've had over a year to prepare for.
But, reading the YouTube comments, this thing is the Second Coming, and anyone pointing out the faults is a hater and just "jealous" (never mind if they also happen to be backers, they're still haters!).
I know I shouldn't be having so much schadenfreude with this game, but I have to at this point.