Pros:

+ Extremely detailed to the touch, colloquially set.

+ Transitions between levels are smooth and fluent.

+ Differentiating paths make the experiences going through multiple times enjoyable.

Cons:

- Bug on the cable car/tramway where it is possible to fall out.

- Unclear paths during certain parts make it hard to make it to the safe house.

Conclusion:

While in beta, Yama shows extreme promise. Detail and set-place in a foreign environment are well made, properly placed, and make the transitions between the area smooth. While there are a few little bugs here and there, it's a beta worth trying indefinitely.

Pros:

Left 4 Dead 1 Survivors complement the map.
Urban Setting with fitting decal (alley ways, garages, etc.)

Cons:

Map seems far too small at times.
AI Need a massive improvement, priorities on who to rescue first.
Special Infected spawn in odd patterns. (Had Two Smokers and Two Jockeys at the same time.)
Tank was glitching on the truck near the rooms up-top of the garage area.

Conclusion:

Containment is a generally stable survival map that has good replay value. With various spots to hide in this urban inspired survival map; ranging from the renovated offices to the sandbags in the rainy urban streets, I might make a second trip to this hopeless, contained area.

Pros:

Boss Fights
Throwback to classic Sci-Fi television and movies.
A classic Science Fiction Feel.
Music Placement.
Pacing.
Custom animations via bosses.

Cons:

Boss fights have little direction on how to combat them.
Little Replay Value.
Observed a graphic glitch in the first playthrough when holding an M16 (appeared invisible).

Conclusion:

The Return of the Jockeys is one to acknowledge, with such a detailed, sci-fiesque quality, it makes it a return to really reckon with.

The eerie ambient music that plays while traversing through the light, zombie infested space hallways while looking at the endless, vast, black space gives a general feel that this campaign is literally "Out of this World."

While I won't spoil the boss fights, a lot of the fights are throwback to classic enemy weakspots, and in general one reminds me of another very classic sci-fi game's final boss. The author clearly knows what they are doing and what they were aiming for, and definitely for a boss contest, it's very well made.

Return of the Jockeys is something I can see myself returning to very soon. 

Pros:

Nostalgic feel that throws back to the NES days of the 1980's.
Keeps in touch with the original four first levels of Super Mario Bros.
Implementing item boxes on getting aids/weapons.
Adding ragdolls of Nintendo icons gave way to a nice undead feel.

Cons:

World 1-1 has bots falling to incap on the flag pole.
World 1-2's design for platforms can cause accidental incaps, even if simply jumping on them from short distance.
World 1-3 has bots falling to their deaths, dropping then incapping.
World 1-3 has special infected falling to their deaths.
World 1-3's crescendo event feels too short.
World 1-4 had a music glitch where when tanks spawned, music did not play.

Conclusion:

Generally as a Nintendo fan, this would be a recommended campaign. But there are a few flaws that hold it back from being a definite recommendation.

The first major flaw is the general fact that playing with bots might mean that you are going to have to start over. The general intelligence of the bots on Left 4 Mario is astoundingly bad, worse than claimed on the default campaigns or other customs, bots have fallen to their deaths, and incapped on the flag pole in World-1. However, playing with other people definitely makes up for this.

Next is the general feel of the campaign. Unlike other custom campaigns, I feel as though the design is desolate. Few times are there ambient noises that fuel paranoia, or in general, a sense of awareness to the apocalyptic surrounding.
It's quiet, too quiet.

Regardless of these factors, Left 4 Mario is slight 1-up with a few downs and will definitely have you goomba stomping for replay value.

Pros:

Extremely detailed map designs.
Interesting transitions between maps.
Zombie outfits complement where they are found.

Cons:

The odd Crescendo event with the crane, first time through I thought you were suppose to actually fall down on it or stay on it.
Numerous tanks during the finale.
The escape box-car seemed out of place.

Conclusion:

Tour of Terror is a design I would generally favor as a staple example of author creativity. The map designs are extremely detailed, and seem out of place with the general Left 4 Dead feel; which is the main exact reason I love this campaign because of it's transitioning effect of being in a different place entirely.

The Eastern European feel is definitely caught with miscellaneous, unidentifiable landmarks and landscapes that give the feel that you're in a different place entirely from the Left 4 Dead universe. The ambient lighting while trying to find your way to the next safe house; the dark, foreign sewers; and open, cosmopolitan streets really gave this campaign an oomph.

If you're looking for a campaign with an overall magnificent feel to it, Tour of Terror is definitely a tour worth taking.