Pros:

Level design is really good.  Lots of thought went into making a good 3d layout.  There is a good amount of both flat and vertical traversing

As SG Heartless is so well known for, there are some REAL  surprises in this campaign 

Good supply of ammo and other goodies.

Cons:

Some level detail is slightly lacking, but nothing terrible

1st map starts off with a rediculous endless hoard until you shut off the alarm.  Fortunately that isn't very far.

Conclusion:

One thing I noticed and that I really appreciate is the lighting.  From the beginning where it is dark outside to the last map you really get the sense of time passing with the final map being early dawn....very well done.

Good textures and modeling, very good infact.

Unique features in the various maps make for some very interesting navigation.

NO TEXTURE ISSUES...but then SG Heartless wouldn't post crap unless it was thoroughly  polished.

Pros:

Easy difficulty level which makes for some long game play.  I got to 11 minutes with bots my first time out

Lots of ammo, guns  and supplies and they are easily obtainable

Lots of special infected and the difficulty ramps up appropriately.

Cons:

Level design is rather bland, but that makes for a good easy stand off.
 

Conclusion:

If a long standoff is your thing where the difficulty level ramps up slowly then you will enjoy this map.  The level design is centered around making a stationary standoff, so you will probably not be moving around very much.  As a result it will get boring after a few play throughs.  But it does make for some fun gameplay while the interest lasts.

Pros:

Superb space station layout
Superb textures
Outstanding use of normal maps
Great frame rate
Fantastic lighting

Cons:

Could use "slightly" better ammo/weapon/health drops
The aged black and yellow caution textures on the sliding doors don't match the rest of the interior

Conclusion:

This is an outstanding map that shines throughout.  THe creator has layed out a very conviencing space station that is filled with lots of authentic looking details.  It would be interestng to see if some of the sliding doors could be opened and or closed to divert the route the hoards take to attack--sort of like in Alien 3.  I usually don't care for Survival mode but this map actually makes it enjoyable.  This map has a very professional look and polish to it.  I think most will be very satisfied playing it.

Pros:

 Great map choice for a L4D2 campaign
Good use of and timing between hoards
Good use of weapon, health and ammo drops
Good work on the lighting of each leve.  Much different than the HL2 version.
Works well with stupid bots and even better with people
Lots of vertical as well as horizontal movement in the levels........again, it's a Valve map so good choice.

Cons:

Lose the finale music.  If I wanted to listen to music I would play my own.  Plus, it is SOOOOOOOOO Loud  you can't hear anything going on around you.  It definately detracts from the enjoyment of the end of the game.

The narrow corridors get a little tiresome but thats not your doing, it's a Valve map so probably best to leave it.

Conclusion:

Everything works well.  Sure there are some individual elements  I would change but this is a great campaign with lots of variety, lots of hard work put into it and it shows.  I give 90% for the Valve map but 95% on your hard work