Pros:

-Great amount of detail on the objects.
-Really makes the game feel more realistic.
-Great product placement

Cons:

-The game takes much longer to load
-Sometimes it really makes the maps laggy, especially custom maps

Conclusion:

Overall this is a great add-on. It's sort of like adding a scavenger hunt to the game; go through it and try to find all the different realistic products. But, as listed in the cons, it takes the maps much longer to load, This is a very big download to add to an entire map so you can imagine. Many times it's crashed my game, but only when I've tried to play on custom maps. If there's anyway to fix this along with the lagging on the maps, that would be greatly appreciated. I would love to give this a higher rating, but since it's such a hassle to play with this add-on I can only give it this, for now anyway.

Pros:

-The "Realistic" part of this really lives up to its name.
-I liked the detail to their clothes especially. How do they remain clean when they go through the swamp and sewers?
-They're so pale they actually do look like infected themselves.

Cons:

-Their eyes are a little creepy, kind of lifeless, but it just adds to the effect, so what-the-hell.

Conclusion:

I've always wondered how they stayed so clean. Especially since Nick would always complain about his suit getting dirty, when he barely had a stain on it. I like these designs so much better. You should really consider making some for the original survivors. I'd love to see how they'd look like this.

Pros:

-Great locations; a cinema, a forrest, a school. Not a boring part of this map.
-Great use of radios giving updates on the infection.
-Good item placements
-Very original design for the school.
-Great lighting, there wasn't one moment where I couldn't see very well.
-Great use of dialog among the survivors.
-The bots functioned well

Cons:

-The first chapter lags like crazy.
-During my second time playing through, at the police station messed up or something. I lit the newspapers in the cell on fire and the alarm went off but the cell doors didn't open. I don't know if it was a glitch or there was something else I had to do, I died before I could figure it out.
-On a few walls in the cinema there's no design, just that annoying pink and black tile pattern that shows up in Valves games when an image can't be shown.
-One small thing that's not really important but bugs me anyway is that one of the movie posters in the cinema is for "The Last Man On Earth" which is actually a vampire movie, not a zombie movie.
-The finale was a bit too easy, but that's better than it being too hard.
-The two witches in the doorway, in the school, you had to go through was a bit cruel.

Conclusion:

This was one of the best campaigns I've played. The designs are so smooth I would have thought Valve themselves had made it. One word of caution is that this campaign was surprisingly long; it took me an hour and 33 minutes to complete it. This isn't bad, just make sure you have enough time when you sit down and play it.

Pros:

-Great Mall setting, this is what the mall in Dead Center should have looked like.
-Great Voice acting, a lot of it was really funny. Just kind of wish the survivors could have been a bit more vocal, but oh well, minor nitpick.
-Makes me wanna watch Dawn of the Dead
-Good weapon placement
-Nice use of radios and TVs

Cons:

-Sometimes a bot would just stand in one place and get left behind.
-First time playing the game crashed on the final map's loading screen, hasn't happened again, yet.
-The part with the fork lift was a little annoying, I know this is about teamwork, but the forklift moved really slow. Still I only died trying to move it, one time out of three.
-The finale wasn't hard, for me, but that was were the bots kept falling behind. I ended up dying my first time getting there because the bots were so behind they couldn't help me.

Conclusion:

As I said in the Pros this is what the Dead Center mall should have been like. Don't get me wrong I love the Dead Center campaign, but the mall in it is so bland, I can only remember it having a few colors. This mall is so much more fun, with all the different stores, and easter eggs to find. Although the finale might get a bit vexing to a player playing of single player, this campaign is still a lot of fun nonetheless. Great tribute to Dawn of the Dead, and great campaign.

Pros:

-Great portrayal of my Hometown of San Antonio. Gotta wonder if you live there, you just got so many details, like an H.E.B. store, KSAT 12 news vans, and the Tower of Americas
-I love the use of the storm, even if it's not realistic (we don't usually get storms like this in San Antonio).
-Ran smoothly for the most part except for the last two maps.
-Good weapon placement.
-I had no problem with endless hordes or bots starting the alarm as some people mentioned.

Cons:

-A little laggy at the end of the 4th map
-Very laggy on the finale
-During the 4th map I was incapacitated and the bots wouldn't help me
-One thing about the Kelly Airforce Base, just on the record of authenticity, the real life airbase is now called Kelly USA. Just letting you know if you want to really go out for portraying the city as it really is.
-I feel there should be a few more ammo piles, especially in the safe rooms
-There should be a little more dialog.
-I got stuck under a car lift in the car garage in map one, and almost didn't get out.

Conclusion:

Although I may have listed more Cons than Pros, I really liked this map. With just a bit more tweaks this could be a really good map. Some of my favorite parts were the H.E.B. store, and the Air force base. It's especially fun if you're a native of San Antonio like me, there's so many little details that only people who've been to the city or just Texas would notice. You clearly put a lot of work into this map, You just need to tighten the hinges a little. I agree with L4DTeak's comment that you should pitch this to Valve. Overall this map is fun and original. I hope you're able to finish it, it would be a shame to leave such a fun map at only 95% completion.