I've sailed on the Miracle out of NYC. We had a good experience in terms of embarkation etc. at that port - things seemed organized. We're leaving out of NYC again this year on Norwegian Gem.
Miracle is my favorite ship to date!
Booked on Carnival Freedom, Feb. 2012 (Cozumel, Costa Rica, Panama)
NCL Gem, Sept. 2011
NCL Jewel, Feb. 2011
NCL Dawn, Sept. 2010
NCL Spirit, Feb. 2010
NCL Gem, March 2009
RCCL Explorer of the Seas, Feb. 2008
Carnival Miracle, May 2007
Carnival Conquest, April 2006
Caribbean Princess, Feb. 2005