I quite enjoyed it, Valve's other maps are usually tight spaces filled with Trucks, boxes, warehouses, and trees, nice to see them open up a bit. Makes playing infected a lot more interesting, and the direction of oncoming attacks less obvious. Covering good infected spawns with players is a lot harder now (dare I say, impossible in most circumstances?) If you even have two people on the infected team that kinda sorta coordinate (a little) then they'll be rewarded a lot more than in other campaigns, I feel. And the survivors are alot more vulnerable when running between buildings.
Panics are awesome in this map though, the infected come from everywhere, and they don't all come in one mass that you can mow down with a few shotgun blasts, it makes you sweat in some parts of the map. Excellent nav work.
Aesthetically the maps are terrible though, not at all up to valve spec, but I wouldn't dare say it looks like an average community map. Buildings are somewhat bare, lighting is strange in places. Like someone else stated, textures are sloppily assigned to both faces of some walls. Almost no new models, but some very clever uses for old ones. But if you can look past the graphics, the gameplay is excellent, I hope L4d2's maps play like this.
In Valve's other campaigns, you could usually tell exactly what path survivors are going to take, within a margin of error of about 2 inches. It's not that people don't wan't to go somewhere else, it's that they can't, the maps were just too linear. With this map, there are almost always multiple paths to the same areas, and it really varies the gamplay in a way that I think valve originally envisioned l4d to be. Yeah, technically the other campaigns have "alternate" paths but they really don't, you're still in the same areas, and the infected can set up at the same spots, and you're usually within direct line of sight with another path and it's not that way with this map, not to mention the 'out of the way' rooms where items can spawn.
I'm a bit dissapointed that they put a massive building right next to the crescendo spot though, I don't know why they thought that would be a good idea, everyone always ignores the battlestation with the minigun and the army truck (for good reason, you can get damage pounced really easily from roof) and crouch in a corner inside of the room. And what's even more disappointing is that valve seemed to expect this, so they put a couple of DISTANT infected breakable walls around, but they don't do anything because they're so far away from the camping spots. Maybe if the zombies didn't have to run 500 feet in plain sight before they got to you, it'd be alot better.
And I may be wrong about this, but it seems that the item spawn densities are really high, When I'm playing with my bros, we get like a pipe in every building, and it makes the whole thing smooth as butter. We get so many pipes and molotovs that we can clear just about any major area before we run through it. BUTTTTTTTTTTTTTTTTTTTT if we get boomed, they don't help that much, like I said zombies come from everywhere, and they're spread out, so even if you throw a pipe or two, you won't get everyone.
I just can't wait till all the noobs uninstall the game again

they're making my vs. matches lame

My verdict: Great fun, but ugly, if you didn't like the game before the maps, you won't like it after. If you play seriously then it's an excellent change of pace, if you don't, then you might still like it
