Pros:

1) Nice atmosphere., very reminiscent not only of  No Mercy but also Crash Course.
2) Very lengthy but well detailed course.

Cons:

1) No health.
2) Few weapons.
3) The bots rarely pick up anything. 
4) The special infected get hung up. You will hear them but they won't (can't?) attack.
5) Some missing textures on piles of pallets.
6) Some ambient sound errors. I was walking on the streets and I was hearing the sound of floorboards creaking. 

Conclusion:

" five grueling maps "
Your not kidding!
If you are trying to give a "feel" of realism; trying to find your way through back allies, running low on ammo and everything else desperately trying to stay alive as your team mates drop one by one.. then the author has done a good job.
If not it's just frustrating. 
Question: why wont the bots pick up weapons and health kits even if they are standing right on top of it?

TL;DR?
Give this one a pass. There are better maps out there.

Pros:

1) Very creative use of lighting, shadow and textures.
2) Cool music, especially at the beginning of the first 2 maps.
3) Interesting and unusual (if a little quirky) setting and level layout. 

Cons:

1) The bots are worse than useless most of the time (fail to defend themselves or pick up guns/ health packs etc.)
2) Glitches and graphical errors everywhere.
3) Some levels are way too long.
4) Insufficient ammo dumps/ throwables/ kits.

Conclusion:

The original is a L4D map and is  not completed. 
On the author's page it says it is 75% complete which possibly explains why, on the macro, level it looks EPIC... but on the micro level, there are so many glitches, graphic errors, bot Nav erros and blank wide-open rooms with no real details, furniture or doodads.
 You can clearly tell that somebody with a considerable amount of skill put a lot of effort into making this map.. but abandoned the project.
Yes it is an awful lot of fun to play IF you are playing it with three other human players. 
If you try to play the campaign solo with three bots? Prepare yourself for a great deal of frustration and disappointment. 

TL;DR?
Play it with your friends. You will have fun with it. No friends? No fun. 

Please feel free to check out my full review and some gameplay at:
http://www.youtube.com/watch?v=hpMwbJc3mcM

Pros:

1) Very cool map design /layout.
2) Excellent use of the game engine and the map authoring tool.
3) The level of detail in this map is outstanding!
4) Some custom voices and sounds.

Cons:

1) Each map is VERY long and will take quite a lot of time to complete.
2) Melee weapons are few and far between.
3) Gas up the generator.. *sigh*.. again?

Conclusion:

I really enjoyed playing this map. Even though this map will take you some time to get through it, there are enough "events" and tasks to keep you interested. Also the level of detail of the map will keep you wanting to see what's coming next.. to find out what's beyond the next corner. 

Despite it's size, finding your way through the map isn't all *that* difficult, although it is possible to get lost at times.

As for gassing up the generator.. it's fine when you've got your friends playing with you, but it's just plain irritating doing it solo. Anyway it's a very minor negative point.

In conclusion: I would strongly recommend downloading and playing this map with your friends..

TL;DR?
It's freeking awesome. Get it. 

OH!
 Don't forget about the scavenger hunt!

Please feel free to check out my full review and some gameplay at:
http://www.youtube.com/watch?v=CfZ0ThfgrCQ&feature=youtu.be

Pros:

1) A very effective training Map for learning how to deal with Witches.
2) Fun interesting and challenging in some parts.
3) Good crossover concept. 

Cons:

1) The Bots are not active and will not help if you go down.
2) If you die you have to sit through the opening sequence again and again.

Conclusion:

If you love Portal and you love L4D you will get a big kick out of this map AND if you are having a hard time crowning witches.. you NEED this map. Also the custom dialogue is very cool (if a little difficult to hear/understand at times)).
I wonder.. are there any plans to do a similar map using Left 4 Dead Two?

TL;DR?
Good map. Get it. Practice killing witches. Stop being a noob. :D

For additional hints and tricks to use with this map and some gameplay please feel free to check out my full review at:
http://www.youtube.com/watch?v=iqq2kI_lQmo

Pros:

1) Extremely well detailed map.
2) Because of the creative use of lighting sound, even with the lights on, the house still seems a little bit gloomy and desolate.
3) An adequate number of supplies scattered throughout the house.
4) Some secret hidden areas to explore when you turn the lights on.
5) A good number of places to "camp" in when the shooting starts.

Cons:

1) You might spend all of your time exploring the map and not killing zombies.

Conclusion:

**NOTE**
If you have any other mods/maps etc installed you WILL get a “
Server is enforcing consistency for this file:
scripts/weapon_rifle_m60.txt
** BUT! **
There is an easy fix.. just move all your .vpk files and everything else to another directory or delete them.

Anyway..
There are *so* many custom textures in this map everything from artwork on the walls, pictures on shelves, the music in the jukebox and some .. peculiar... images that appear on the video screens once you turn the lights on and get going.. It's quite obvious that the author put a great amount of effort into making this map. I don't give 10/10 very often but this one definitely got the “Solaris Stamp of Approval”.

TL;DR?
Looking for GREAT survival map? Look no further. This is the only one you need.

Please feel free to check out my full review and some gameplay at:
http://www.youtube.com/watch?v=pt3mtBTYFvM

Pros:

1)great ambience great lighting / sound (even some new/original sound effects) 
2) Small area but I like it 
3) there some good places to camp in
4) The graffiti on the wall green lighting and the various soundbites really add to the feeling of desolation and of being trapped.

Cons:

1) Not really sure why it looks like an abandoned church and is actually a sewer.
2) The background music while cool does get tiresome after a while.
3) The infected only come from one direction (not that I'm complaining or anything)

Conclusion:

Overall it's a great map to play is quite challenging later on so expect to lack up a lot of kills and expect to die.
It's is definitely worth the download.
If this is Taeuto first map... he is doing a fantastic job.
Hope to see more in the future.

Check out the full review and some game play at:
http://youtu.be/DjEX2gALnJs

Pros:

1) Great map with lots of careful attention to detail. 
2) Cute cartoon Disney like "creepiness"
3) GIANT MUSHROOMS!!!
4) excellent use of sound light and atmosphere to create the correct "mood". 

Cons:

1) The only downside to this map is the final run to the boat. It's very long and fraught with nonstop wave after wave of zombies. I don't mind killing zombies, that's why I got the game, but bots had **a lot**  of problem surviving this area. They just get bogged down and stand there and allow the zombies to wail on them (it should be noted that this is not a problem with this map… This is a problem with Valves programming of the AI's ) 

Conclusion:

I really had a lot of fun playing this one!
Have you ever been to Disney World and gone into the Haunted Mansion? This map is a little bit like a ... Haunted Mansion 2. 
Dr. Boo makes very good use of existing sounds within the  game engine as well as a few new ones.
 This would be a really good game to play with your friends either online or at a LAN party, either way make sure you're all on voice chat so you can hear each other "scream".

Pros:

1) GREAT map design!
2) Very cool texture maps.
3) Lighting was perfect.

Cons:

1) Couldn't get it to start with only one player.

Conclusion:

Could stand a little more fog or "ambient spookiness" 
Good Survival map. 
Recommend if you are having a LAN party with your friends.  

Pros:

1) LOOONG map.
2) Fairly straight forward level design.
3) The route is fairly well marked out.

Cons:

1) The bots have difficulty navigating the ledge part in the first map and have a tendency to fall off.
2) Not really "Futuristic" 
3) No finale or panic running events (to speak of).
4) The ending was a big disappointment. 

Conclusion:

The best words I could use to describe this Map is.. nice.
The graphics are nice. The level design is nice. The sound and ambient noises are nice.. even the music at the beginning was nice.. it's just really really... well... nice!
 
However, interesting or remarkable it is not.

This map is supposed to be set in the near future.. Except for a few solar panels at the very beginning I see no difference between walking through the mall today and this map. I was kind of expecting to see strange architectural features, interesting use of lighting, and even some custom buildings.. but alas there were none.

++++++  OVERALL +++++++
Creativity: 20/30 (pretty vanilla level design but fun)
Playability: 20/30 (no glitches or missing texture maps)
Overall effect: 26/40 (Some of the areas (ei the bridge) looked very cool)
=====
6.6 /100

Pros:

1) Simple level design: easy to navigate around the map. 

Cons:

1) On the second part there are some textures missing. (NOT IN THE NEW VERSION)
2) Mega Magic Skulls? Really?
3) Only 2 maps, kinda short.
4) PINK AND BLACK SKYS!!

Conclusion:

Check out some game play and some commentary at:
 http://www.youtube.com/watch?v=2_b92Lr0_e4

I found myself liking this map, even-though:

1) You really need to turn on the "game instructor".. otherwise you have NO idea what to do next.
2) Hovering skulls... in a bar in the middle of the desert. Satanic yes but it's just kind of crow-bared into the map with no real explanation.. Scratch that, how COULD you explain having to collect hovering. glowing skulls to start a bus.. must have missed the movie.
3) The bots get REALLY lost and have to teleport to your location after you have gone down into the cavern.. behind the bar.. *ahem* anyway...

***** OVERALL *****
Creativity:           15/30 (Skulls were quirky but cute)
Playability:           20/30 (Missing textures etc)
Overall effect:     30/40 (The area behind the bar where the tank is, is very cool)
                           =====
                            65 /100