So, just reached chapter 13 a while ago.
I must say Visceral did come through with the single player, feels exactly the same as Dead Space 2. I really enjoyed DS2, including the multiplayer that people kept bitching about.
Also Norton is a total dick. Saw it from miles away. BLEH. Glad I get to shoot him in the face.
Haven't got on co-op so far. Tried to do it with a friend but he's a lazy bastard and we ended up not doing it. :[