Definately a great map, with excellent ambience and style. Reno's comment on the cramped feel is correct, I doubt many of the corridors would be able to fit more than 2 players side by side. However I think if you could garuntee players wouldn't get caught on objects in these narrow areas, it would create a very tense style of gameplay, aided by the washed out and murky environment.
Well polished, a pretty darned good layout, and excellent ambience definately make this map a keeper 
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