Pros:

Looks exactly like what Disneyland would look like if an Evacuation Zone would be held there (which is the entire point of this campaign)
Funny Dialogues from the survivors
Iconic places like the Haunted House and the Splash Mountain are there
Rides do have use and unlike the Roller Coaster in Dark Carnival,you can ride the boat in the Splash Mountain tour and it will take you through the Splash Mountain without you even have to walk
Campaign runs Smoothly
Campaign feels much more fun and happier than the Dark Carnival campaign and it's kind of like a Dark Carnival campaign for the L4D1 Survivors just sunny

Cons:

Finale was meh.It could be a lot better
When the chopper arrives at the finale,one of the bots will try to jump off into the water but hang on the fence
There are riot zombies but no clown zombies 

Conclusion:

This campaign is just a really great idea actually it's like the Dark Carnival campaign has been made for the L4D1 Survivors.Despite Disneyland being overrun by zombies,it doesn't really give you that creepy feeling and it also in the daytime but that could be a good change if you're used to playing creepy custom campaigns.One thing that puzzles me though is that there are riot zombies but no clown zombies.But despite all the few cons,this is definitely a great campaign and I suggest you download and play it