Pros:

Interesting lighting 
Very moody and ambient
sometimes too dark to see what's happening (pro)

Cons:

sometimes too dark to see what's happening (con)
Endless hordes

Conclusion:

Thanks for the campaign but I found it frustrating due to the endless hordes and haven't managed to finish map 1.  From reading other comments this sounds a great map but the difficulty level is high - I'm playing it on normal.  I will have a try at playing on easy to see if I get any further into the campaign and if so will amend my rating.

Pros:

interesting and well thought out locations
Nice to have L4D1 survivors and nice touch for their new dialogue when you left them
I really liked the laboratory

Cons:

some frame rate stuttering (maybe my PC as its getting old)
new locations possibly not developed fully
Could the L4D1 survivors be used more?  Could we have more interaction with them?
Foundry was difficult to work out where to go

Conclusion:

This was fun - a great capaign with some solid and difficult game play.  The hordes in the final gauntlet were endless but it was a challenge rather than totally impossible.  Some nice touches with the laboratory, the caves and the L4D1 survivors but a little undeveloped would have liked more of the laboratory the L4D1 survivors and the caves.
Thanks for the campaign Bloue it is appreciated

Pros:

original series of maps - nice to see our survivors fighting off European zombies
Maps repay exploring
Design of the maps mean they remain interesting for replays 
Addition of fallen survivor - very nice touch

Cons:

Freeway map was extremely difficult with two tanks and took many attempts to complete

Conclusion:

A great campaign.  Very enjoyable to play in settings outside of America.  I am hoping that someone creates a 'Last Days of London' campaign.  I think this should be on the list of 'must have' campaigns for L4D2.  Thank you Novalin

Pros:

Three fun maps in a quick campaign
Nice thinking to fit it in around the Jimmy Gibbs car

Cons:

No real cons. Except the logic of the finale.  As people said three generators to power one crane is odd.

Conclusion:

This was a blast.
Thanks for your work - it is appreciated and enjoyed.

Pros:

Very detailed maps
Different levels to jump up and down to
Custom dialogue and sounds (great for sniper rifle)
Good placement of ammo, throwables and health packs
Locations are beautiful (the bridge and the finale island)

Cons:

Occasional invisible objects
Occasionally managed to get high enough to see the edge of maps
Custom skin for the health pack (now olive green) was unnecessary
Bots didn't save me (once)
Often there were ladders that we couldn't use - wold have been best to make these invisible or blocked
Finale Island was great but the finale needs tweaking

Conclusion:

A lot of thought and hard work has gone into developing this.  It gets to be a cliche to say this is as good as Valve's.  I felt in many respects these were better than some of Valve's only let down by the final tweaking that would make this campaign damn near perfect.
Neojo - excellent my friend and most cheers and thanks.

Pros:

Custom voices, sounds and animations
Quality mapping with coherent geography and pathways through the map
The mall and the roof of the car park was beautifully designed and rendered
New grafitti in the safe rooms and other areas  

Cons:

No subtitles for the custom voices 

Conclusion:

An excellent campaign.  It is comparable to Valve's originals (and I rarely say that).  I really enjoyed the animation of the car driver who turns up at the petrol station.  My only negative is on subtitling (I am a deaf gamer) also this is an international site and a lot of users where English is not their first language are helped by having the subtitles as well as the voices.  Excellent work and thank you for all your hard work.

Pros:

Interesting series of maps
Nice car models - yes I like the Mustangs and even the Golf Gti 
Smooth flow of gameplay
Creative maps - even with a train line running through it

Cons:

Finale boat could have been better designed. i.e. lights come on when the boat is called etc.

Conclusion:

Thanks immensely for this. Your work is much appreciated and I hope you will come back to game design after your rest and studies.

Pros:

Well designed maps with interesting environments and buildings
Enough tanks and special infected to make it a challenge without becoming near impossible
Good use of written texts in the School
Excellent use of graffitti in the safe room 

Cons:

Lack of captions on the radio message for the finale
Yes it is flat but I assume this is Idaho etc

Conclusion:

These are some of my favourite maps and I think the reviewer who gave it a 1 rating was spectacularly ungrateful.  The campaign is clearly designed with care and a lot of hard work.  The high point for me is the School which fills in (or creates) back story that Valve doesn't give us in the original.  There is great use of text, books and blackboards to flesh out (no pun intended!) the story.

Pros:

Atmospheric series of maps
Great start with the newspapers setting the background
Dark and scary

Cons:

The van wouldn't move in the Arena map when I played just with bots 

Conclusion:

An excellent campaign - just a shame that the Van doesn't always work

Pros:

Very detailed series of maps
Excellent overview in design to ensure challenge and playability
Good attempt to create something different for the finale - which after some frustration I very much enjoyed

Cons:

Occasionally a bit linear
The finale:
Firstly not easy to understand - but perhaps that makes it more of a challenge and the instruction are in the notes.
Secondly where the bots would not enter the escape vehicle with me and of course died.

Conclusion:

These are some of my favourite maps for L4D and that includes Valve originals.  Very enjoyable and thanks to Valar and others for allowing us to play these.

You know I would pay for maps as good as these.  Maybe the modding community need to look for a way of collecting micro payments?

Pros:

Increasingly entertaining series of maps
Thanks for the portal puzzle - I didn't work it out but thanks for adding something innovative
5 witches at the same time!  This kept me amused and frequently dead.

Cons:

First map - the underground cavern - I thought wasn't well designed or implemented.

Conclusion:

A great effort particularly trying to do something different with the technology and the genre.  I hope we get a chance to play more of your work.
My opinion of the first map has brought down the overall rating.
Thanks

Pros:

Detailed maps with a good range of variety in the landscapes
Challenging maps with enough tanks and shortage of health and ammo to keep me anxious

Cons:

3 maps and waiting for the campaign to be finished

Conclusion:

An excellent campaign (sadly unfinished) that rivals Valve's own maps

Thanks  100_o/o_f@ke and romasm for designing these and it would be great if you can finish them

Pros:

Entertaining city environments
Fun finale at a semi-derelict football ground
Very good pacing of hordes and special infected

Cons:

A glitch in the first map when I closed the doors in a shop and the doors would not open again.

Conclusion:

Apart from a tiny glitch this is an example to all of us of how an add on campaign should be done.
Cheers and thanks J. Sera for creating this for us.

Pros:

Nice series of maps
Exciting for everything to be at sea
A perfect challenge for me

Cons:

Maps are sometimes difficult to navigate - although this is not fully a bad thing as come the Zombie apocalypse we are unlikely to have helpful arrows showing us where the safe rooms are.
I would have liked more information about what happened to the oil rig workers.  i.e. more interesting grafitti in the safe rooms.

Conclusion:

A great map - thanks for creating this for us.

Pros:

Entertaining conversion of half life maps
I particularly liked the use of graffitti in the safe rooms.  This adds to the atmosphere of a world in ruins and overrun by vicious infected

Cons:

A bit short on pipebombs and molotovs

Conclusion:

Thanks for this.  A real good effort and very entertaining to play.