Pros:

The Lord of the Rings, what more can you freaking ask for?
Gandalf and Gimli
Fun, and it keeps you on your feet, constant action
The only Survival map with an ending

Cons:

I haven't got any :P.

Conclusion:

One of the greatest maps I have played, so fun; I am looking forward to more maps from this map maker!

Pros:

Fantastic introduction.
Textures and models are stunning to look at.
Very good detail all around, and not such a rushed campaign, taken with care.

Cons:

A short campaign, but unfinished, so I can't say much on this.
I haven't got many cons to think of, the campaign is just really good and well-made.

Conclusion:

It's a short campaign, but excellent, the models are stunning, the intro is also fantastic, I haven't seen an intro like this in any L4D campaign I've experienced.  I do wish for the creator to make the map more complete and longer, because it's such an awesome campaign, I wouldn't want to see it go to waste.

Excellent campaign, I am looking forward to the future maps.

and...  the conclusion is:
You should download this campaign, it has detail, and it is also very fun!