I've been blogging my build of this set at WorldWorks Forums. Here's the final result, used in play last night (custom adventure, not the published one). Everyone pretty much agreed that leaving the corridors 2D was a good move from an "ability to move minis" standpoint.
This is a great set! I can't figure out how to embed a pictures (the IMG tag seems to be disabled for some reason).
Pic 1
Pic 2
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Pic 6
Pic 7