Amazing is the only word i got left. Simply amazing. This zone beats them all, it beats every zone the horde and ally has to offer combined.
It also contains an amazing ingame cinematic:
http://www.youtube.com/watch?v=FH16531Ny_s
I suggest everyone to do this zone as soon as cataclysm goes live, or atleast after uve dinged 85.
SPOILERS:
You play the first few levels as a member of the gilnean resistance fighting against the worgen, then you wind up cursed as one shortly before the forsaken begin attacking gilneas, you run off, get captured, brought back too the city and given the potion that gives you temp. control of your mind