Great Realistic feel to the map. It felt a lot easier than other survival maps, which makes me want to play it more often because I'm not dying in the 1st minute after being bombarded with infected. I loved the fact that you put in the M60 machine gun, as it lets you get used to it rather than using the only one in "The Passing". The other thing that pleased me is the file size. Now, I know that other maps are pretty much the same as this, but this is the lowest file size that has a really nice package inside. In the changelog it says you have added versus (which I haven't tried yet), which means that it pretty much doubles the play time that you can get from this map.
The only one I can think of is that there is nothing from stopping you getting over the fence and crashed tanker at the back of screenshot 1 & 2. Nothing major, but me and my friends always test the map for glitches after we've played it, and we found that if you went into the hole in the tanker, it is impossible to get out of. As I said, that is nothing major (unless you go into the tanker), and you shouldn't worry too much about fixing it.
Great map, certainly the best I've played since getting Left 4 Dead 2. Lots of health packs mean you can survive longer and it isn't even an overly hard map to survive in, even with the health and the M60 machine gun. But no maps can be perfect, and the issue I described in the "Cons" section should explain it in more detail. The only thing I'm going to say is... When's your next map coming out??
Amazing attention to detail, and it took me about 5 minutes to look around all the rooms! I absolutely loved the way you spread weapons / items around the map, and I also liked the Dead Air "tied together" gas canisters that were spread around at least 2 places in the map. Large map with lots of places to survive, and makes the player play the map multiple times to try and find the place that lets them survive the longest. You should be really proud of all of those things. Once again, loved the detail and the custom textures.
Obviously there were some nav problems, but when you play with friends that's not a problem. Another small problem was that if you try and stay in the house after you've called the rescue (That obviously doesn't come), it's really easy to reach at least a bronze. I believe that the first time I played it I managed 1:19 minutes without firing / killing an infected after I called the rescue.
(Just to let you know, I do know you have released a new copy of the map, with the fixed nav problems, so you can pretty much forget the first Con... But remember, the review is on this map).
All in all, a superb map, with great detail. The 90 hours you used to made this were obviously well spent, and I can't imagine how much you gave up to make this amazing map. Obviously you didn't spent 90 consecutive hours on it, but either you have loads of free time, or you gave up loads of things to create this. Even though there were a few problems with the map, and as I know you've copied the map but fixed the problems, from me, this gets a very well deserved 95 / 100.