Really Amazing Mapset.
Played it in the last week, and I must say the maps felt to me very Atmosphere.
I'm a big fan of "Search and destroyed" maps, and lot's of options to search, many secrets, etc.
About the musics, im very disappointing. I really think a maps of scale like this should have special music each. In some maps I preferred playing with the music muted, to keep the atmosphere.
About map 7, (Labortory), that was really suffering to play it with D_RUNNIN.
Over all, Really damn Amazing mapset, it's something that we dont see everyday and it must be appreciated.