Enjoying this so far. Campaign is great, really brings me back to the old CoD 1 and 2 games. At least that's the "vibe" I'm getting from it. Only annoyance so far is that enemy soldiers take a fuckton of bullets to kill... Again.
Angry Party Pooper zombies. Oh boy. The only word for it is "Chaotic". Figuring out where to go and what to do and where everything is has just become a clusterfuck. They've made it overcomplicated and confusing as hell.
Online play is pretty good too, So far I've only tried TDM, Dom and War. Only gotten the Ardenne forest (I think) map on War, depending on the defending team matches can be over within minutes or it can be a real nail biter. My one gripe with War is that I forsee a stacked party of 6 absolutely demolishing the opposition in this to the point where it just gets boring for everyone.
As for weaponry, single fire rifles (M1 Garand) are terrible. Too much recoil and if you are getting shot at there is no way in hell you are hitting your target.
"Go to" guns early on seem to be the PPSH, STG44 and the Carabine sniper rifle. Pretty much covers close quarters, medium and long range damn well. Carabine "sniper rifle" needs a nerf though. It's pretty much a lazer beam at all ranges, fired scoped or from the hip, and has rediculous fire rate. I've lost more close quarter fights against it then against shotguns.