As most of you guys know the demo came out this week on the "OTHER" systems network, but no worries it will be up on the PSN next Tuesday.
I got a chance to play it so here are my quick impressions. The graphics are pretty good(as with all the Dead Space tittles) and the gameplay mechanics are the same except now you have the ability to duck. Even though this is not a pure survival horror tittle, the atmosphere is still pretty intense and the necro's look a lot more disturbing and they are HARDER to put down.
I haven't had a chance to try out the weapons modification system or co-op yet but when I do I'll post my thoughts on that as well.