Impressions so far:
Am loving this game. It's right up my alley. I have not reached the Alien section yet, so hoping I will like that too.
I am running everything high, except shadows (medium) in DX10 currently with very few tweaks and its smooth.
I was a little underwhelmed with the demo, but the more I play it the more I think they have done a great job.
And for those who are wondering about multi-core support, it is using all 4 of my cores very nicely. Of course, the cores are not maxed, but I say thank God to that - hopefully it means I have a couple of years before it starts showing any signs of age.
Could not even sleep late today cause I wanted to get back to this