Picked this up yesterday. Pretty sweet, but the campaign was just not as cool as Halo 3's. At one point there are some Scarabs, but you don't even get to destroy them. Nothing terribly wowing, although the story was pretty good considering that was no MC and minimal Cortana. Mostly just psyched on the multiplayer this time around.
I happened to meet Atomu the other night, so I'm posting in this thread because I know it's one of the only threads she posts in. I don't think she was as impressed as I was to randomly meet someone from a forum of which there are like 5 - 10 active posters.