If people are getting it early, why are there no single player campaign impressions in here? Come out with them! Lol.
I've played for about 4 hours and I'm 7 missions in on Heroic. The levels are ginormous, like there's probably 1000x places to hide things and explore on each map. Seriously every new space you enter is gigantic and theres a ton of places for things to be hidden. My goal was to get as many intel pieces and skulls as I could on the first run through. I got 4 intel and no skulls on the first. and then only a few pieces of intel on the missions after. I only have one skull.
The movement, gameplay, shooting mechanics, and new moves are incredible. This is one of the most naturally feeling games I've ever played. It's like going from the old Metal Gears to the new Phantom Pain. It's incredible to play. This makes me extremely excited for MP.
I'm not going to address story details in any way, but I think it's pretty good so far. It's building up well to this point.
Graphics look good to me. It's not earth shattering, but when you consider how smooth it is, how great the movement is, and then you look at all the stuff going on and the beautiful art direction, it's pretty great. Not disappointed at all.
I'll take any questions you have that aren't spoiler related, etc. I'm trying to respect the release date embargo thing as best as possible.