Sounds like most people didn't play the demo. From what I played, I enjoyed it, but it had some pretty serious problems. For a good portion of the first level, you never see an enemy close up at all. You're shooting at half-inch tall silhouettes. I got stuck on a piece of geometry, and had to start the level over.
The scripted sequences can be interesting, but the AI is as dumb as a rock. The graphics are great when they're working properly, but there are enough graphical glitches and flat out f**kups to break the illusion so often that it's hard to feel immersed in the game.
The worst part, IMO, though, is that say, on the second level, you have a choice of what character to play. But you all play through the same level. So if you're the stealth girl, you go through the one vent there. If you're the gunner guy, you just shoot a whole bunch. Had Guerilla focused purely on making one particular level awesome for one character, I think it would have been a much better game. As it is, it's pretty horribly flawed. You choose the stealth person, then have to find the stealth path. The interesting thing about having these kinds of options is seeing what is available, *then* choosing how to approach the situation. Not the other way around.
I might consider getting this when it's $20. I have no doubt the hype alone will drive this to GH status. But this is the kind of game that competes with MoH: Rising Sun, not Halo.
seppo