Well, to say the least, i’m impressed.
But for those who want to read more. The weapons are great, and as with all games, the maps take a little bit to get used to. Even though I’ve only played 3 maps with everyone else who has the beta, they’re all extremely good. (Except Makin, which is moderate.)
My favourite thing about the game, is how you’re bodies limbs are actually glued together with pritt stick. For example, any explosion will detach your limbs and leave and impressive but bloody corpse. Theres a challenge where you have to fall 30ft to your doom, so to do that, I jumped off somewhere on “Roundhouse” and as I landed and died, my legs fell off. Oh, and shotguns blow people’s limbs off too.
The weapons are great, and again, perks and class custimation make it genuinely fun. However, what’s the point of the bayonet addition if you can use a knife? And the addition of tanks was a very good thing, as they’re perfectly balanced, unless you go in the machine gunner position when a sniper can hit you with a shotgun from a mile off. Also, for PC, Treyarch added the nice touch of mod support. 
But all in all, i’m very impressed, and the developers did a great job. I just hope the full game is as good as the 3-map beta.
Have you tried the zombie game mode yet?
The Zombie Mode isn’t on the PC Beta, and I don’t think it’s on the xbox beta either :\
I dunno if it will even be on PC at all :s
Lucky we have left 4 dead with a SERVER BROWSER, stupid xboxies.
I like to laugh at my X-Box playing freinds from atop my [mid] tower, about what we can do with a PC that they can’t with a big black brick.