Pros:

Very cool.
Great barricade system.
Excellent recreation of a excellent film.
It's Return of The Living Dead in Left 4 Dead.

Cons:

There are not many however, when playing with bots it can be really annoying as bots shoot through the boards and it defeats the purpose. Also, this is a bit petty but, the music is too overpowered by the L4D music which is quite annoying.

Conclusion:

Great map based on the 1985 horror film Return of The Living Dead. The map is very true to the films and has soundtrack music playing in the background. It's a fun map, however it is a bit short(15 mins) and is a little bit buggy.

Overall this is a fantastic map and i cannot wait for a full campaign. The SBS system is great and it definitely makes this map a must-play. And remember to Send More Paramedics!

Pros:

Good models.
Animations go perfect with this mod.
Looks ok in normal campaigns.

Cons:

None.

Conclusion:

These are really good. If wanting a minecraft themed No Mercy or The Parish then team this up with other mods and you have yourself a really fun L4D.

Pros:

It's minecraft tools in Left 4 Dead.
Good model.

Cons:

There is none but, as tailsdoll110 said, it would be good if you could make these tools but have iron sometimes like in the campaign DeathCraft. It is easier said than done, but no cons.

Conclusion:

A great mod containing every diamond tool from indie game, Minecraft. So now you can bash zombies in with a Shovel, or slice and dice some with the sword. An excellent pack.

Pros:

Great ideas for the infected.
Is actually like minecraft.
Has little hints to YouTube celebrity's.
Melee weapons are fantastic.
Good, long and fun. 

Cons:

The End was slightly disappointing as it's a small segment and seems rushed.
There was a few glitches with the hunter.

Conclusion:

Overall, this is a well thought out campaign, and is great for any minecraft fan. The Special infected are really cleverly chosen, for example, A smoker is an Enderman and the boomer is a Creeper. Multiplayer is fun on this campaign and it sums up the entire of minecrafts worlds in six good chapters. However, the length was a little too short and should eventually get a sequel.

Pros:

Good detail.
It's the Prince of Darkness.

Cons:

No screenshots to show the model before download.

Conclusion:

This is a very good mod and it's definitely something i'm going to use for a while. Nick looks great as Ozzy and it's a excellent mod. Download if you are,like me, an avid Ozzy/Black Sabbath fan. 

Pros:

Creepy Face
Fantastic detail on everything(teeth especially)
Extremly Realistic

Cons:

None that i can see.

Conclusion:

This is a fantastic reskin and adds much more scarier elements to the Jockey Special Infected.
Combine this and the many other reskins in Barrywhite's Realism Series and you have yourself a greater game.

I recommend this addon and will play with this on for a long time.