Pros:

- Pretty long
- Good finale
- Custom audio adds to the atmosphere
- Plenty of items to work with throughout the campaign
- When the level design is good, it's really good

Cons:

- However, some areas suffer from subpar level design; almost the entire 4th chapter was pretty tedious to run through and looked dull compared to the rest of the campaign.
- Trevor
- Way too many tanks
- Zombies spawning from all directions every minute, which ends up feeling spammy and artificially difficult

Conclusion:

Played on Advanced for the first three chapters, but ended up toning it down to Normal since it was so difficult.  My friends and I had fun with this campaign, but our enthusiasm started fizzling during the Trevor event, which was ridiculous.  Overrated, but still enjoyable.

Pros:

-Alternate pathways
-Very detailed maps with diverse settings
-Custom assets look great
-Great ambiance
-Interesting new events
-Zombie cannon
-Opening & ending cinematics

Cons:

-The truck in map 5 was really buggy.  You could probably decrease its speed to fix it a bit.
-Panic events are sometimes mandatory, sometimes nonexistent?  I feel they should be mandatory every run, it really makes you feel frustrated if you failed an event the first time, go back to that area, and find that the event is not there anymore the second.  (The event I'm referring to in particular is the one you have to set the newspapers on fire.  There may be other events like it, idk)

Conclusion:

Played on Advanced. Very challenging! We had a lot of fun with this campaign, but we didn't download the missing content fix, so we ran into some missing textures.  Thankfully, it was only on one map and wasn't too prevalent.

Pros:

- Custom assets!
- Ambient noise and music
- Item progression
- End points are not "real" safe houses, which was new and fresh to us
- Use of fog

Cons:

- Chapter 2 was incredibly long compared to all the others.
- Underwhelming ending
- Didn't fancy some of the custom skins/soundfx

Conclusion:

Played on Advanced.  One of my friends is a long-time Silent Hill fan and for the most part likes this campaign.  Should note that no bile jars were found in our playthrough.  Was that intentional?  I had no framerate issues at any point in the campaign.  Also, the viewmodels were still default for me, even though it shouldn't be.

Pros:

- the exterior of the ship is really well done!
- challenging at times
- lovely non-linear level design
- hordes of zombies coming at you from all angles most of the time, which is fun

Cons:

- the interior of the ship looks bland and is repetitive to navigate through
- you can get lost if you don't pay attention to your tracks; needs some arrows to guide the player
- finale needs work; way too easy at first, but then throws a curveball at you with the rescue
- terrible choice of end credits music, makes the campaign seem all the more silly

Conclusion:

Other thoughts:
- campaign is lacking an intro
- when I downloaded this campaign, I was expecting the ship to be partially sunken in at least the finale, which would make the rescue make a lot more sense
- the ending/rescue, as implied before, is sort of anticlimactic because the Titanic isn't sinking or anything

Seeing as this is your first campaign, it was a solid effort and a neat idea: Zombies on the Titanic?  Awesome!  However, some parts of the campaign weren't realized well, especially the interiors, which need more props/detail to help the atmosphere.  The exterior is really nicely done, however, and I liked being able to see the ship from the deck at the finale, gorgeous.  When the end credits music played, though, we all thought, "wtf is this crap?"  Bad song choice, you should have just used the original version.

Overall, it was an alright campaign; not the best execution of an idea I've seen, but my friends and I had a decent time with it

Pros:

-The crates work!
-Platforming!
-Background music!
-Boss fights!
-Ingame cinematics!  So rarely do you see those in l4d...
-Level design!

Cons:

-Zombies did not charge at us at all in the last panic event before the finale
-Part of the collapsed bridge in map 3 wasn't solid, so a friend and i clipped through it
-This campaign should've been more unforgiving with the pits; jump in, climb out, no real danger at all.  I especially didn't really see a point in the pit at the fork in map 4, other than just to stall us
-Finale threw us a curveball; really hard compared to the rest of the campaign
-Ending felt kinda rushed and anticlimactic
-Music was a bit too loud for me

Conclusion:

Friends and I had a blast until the finale, where one of my friends gave up and quit.  Obviously, a ton of effort was put into this campaign, and I really liked the overall result.  Good, nostalgic stuff!

Pros:

- Pretty much the same as the original version

Cons:

A lot of bugs:
- red, blue, green reflections on walls in some maps
- common infected can literally spawn right behind you or even on top of you, completely destroying the immersion
- floating items
- no l4d2 weapons
- at times, when viewing huge, open areas, I can see a large black rectangle from afar blinding my vision

Conclusion:

not a bad port, but it certainly needs some patching up to be excellent

Pros:

- Really beautiful
- Varied environments
- Interesting ideas for the finale
- Some good level design
- The rescue was the highlight of the entire campaign

Cons:

- Too many tanks; there was one that was glitched during our elevator ride to the saferoom (forgot which chapter), and we never fought it.
- I find the fact that we can only fortify 3 entrypoints makes the idea kinda pointless since there are so many other entrypoints per building/area; raise to 5 and it'll be fine
- About as long as a stock campaign, but I honestly wish it were a little longer since all the details/scenery put into this campaign made the entire thing seem like an epic adventure
- Bots can be stupid beyond belief at the finale

Conclusion:

My friends and I enjoyed it

Pros:

-challenging
-nicely detailed, varied environments
-fun crescendos

Cons:

-catacombs felt out of place
-water
-navigation felt tiring at times
-final map was not as fun as the rest of the campaign

Conclusion:

good campaign, had some good moments w/ friends, glad to see it ported to l4d2

Pros:

-Very long
-Intro/Cinematics
-Lots of puzzles
-Hunter model
-Level design
-Enormous amounts of detail
-Witch sounds, lol

Cons:

-Not a big fan of the weapon reskins
-Some chapters were frustrating
-Poor optimization in some maps
-Sometimes, a message will pop up saying director cannot populate map, so we'll sometimes see completely empty rooms
-The bullet time scene at the finale felt too long, I wouldn't mind it if it were much shorter
-Special infected spawn in awkward places when survivors take elevators

Conclusion:

Played v6.0, friends and I had fun, one of my friends is a big fan of the Silent Hill campaign and thinks that if you enjoyed Silent Hill, then you'll enjoy this one.  I think with enough patching and polish, the average rating will rise significantly.  I can see people being annoyed by the optimization issues, but hopefully you will fix them.

Pros:

-Interesting level design
-Detailed
-Panic events were fun

Cons:

-Huge graphical glitch in first chapter
-No respawn closets at all (?)
-Navigating through levels felt really convoluted at times
-Spent a long time searching for the radio at finale

Conclusion:

Pretty good campaign, fun, sometimes confusing

Pros:

-Great execution of concept
-Settings are varied, keeps things interesting
-Cleverly designed levels
-Minecraft ragdolls
-Having to craft items to proceed
-Creeper appearance

Cons:

-At the wall of lava, we shot the block where the piston was supposed to be, and the block turned invisible and left some rubble.  We were confused where to place the piston.
-Was expecting creepers to occasionally appear throughout the campaign rather than just that one in chapter three
-Torches are indeed a hazard
-Small items such as pills and pistols that appear in chests could be left unnoticed
-Got trapped by invisible walls while climbing the hill near the house in the finale
-TNT needs a louder explosion sound
-Just wish it were longer

Conclusion:

My friends and I had some good moments with this campaign.  Those who love Minecraft, but don't have L4D1 (or do, but would rather play L4D2) are seriously missing out.  

Also, to give this campaign some extra length, play it on Advanced/Expert difficulty, it's pretty challenging.

Pros:

-Decent length
-Abundant details
-A couple of creative panic events
-Level design
-Appearance of original survivors!

Cons:

-Car alarms got annoying
-Random witch spawns
-There was one area in one chapter (can't remember) that had a safe house arrow pointing to a boarded-up wall... we were lost for a pretty long time because of that

Conclusion:

Fun campaign, definitely worth trying, but challenging

Pros:

-Tons of hilarious moments with the traps
-Just fun overall

Cons:

-Cart ride was buggy and a pain in the ass to work with, so we walked all the way down the track.
-Third chapter was very long compared to the others.
-Texture bugs

Conclusion:

This campaign might induce rage the first time you play.  Just don't be too serious when playing this.

Pros:

>Idea was well-executed
>Plenty of places to explore
>Well done panic events

Cons:

>Players can easily get lost
>Finale supplies are lacking, but still really easy
>The switch to make the helicopter come faster is an interesting idea, but requires too much effort to go and pull it
>Some repetitive areas
>Could use more detail in the rooms

Conclusion:

Worth trying out.

Pros:

very open environments; a lot of areas to explore
fantastic custom sounds and graphics
unique, well-executed level design
definitely reminds me of Dawn of the Dead

Cons:

panels to close entrances/gates in mall are buggy
players can get lost in some places
the armored vehicle that comes after finale was missing its wheels?

Conclusion:

Never played the beta, but I can say this version was rock solid.  I'll have to play this again with some friends 'cause it's a huge map and I haven't explored it all yet.

Pros:

Well detailed
Optimized; no lag anywhere
Original finale setting
Great little segments throughout the campaign: elevator was fun, and the train ride, though really short, was a great idea
Custom audio adds to the originality of the campaign

Cons:

Extremely lacking in throwable items
Campaign starts feeling repetitive
Finale was too easy

Conclusion:

Solid campaign, definitely worth trying at least once.

Pros:

-Nice concept
-Third chapter was very well made
-Atmosphere was excellent

Cons:

-Some major bugs: When you try to jump onto the hood of the car, you will die; the campaign does not record statistics for anyone but the host, and even then he/she is missing some stats; bots can't get climb the long ladder down the tomb.
-A bit lacking in detail for the more open areas.
-Finale confusing when taken out of context

Conclusion:

Yeah, I had no idea the finale was based off a movie 'til I read the explanation from the author himself.  Still, it was definitely something different.  Good campaign, albeit a bit short.