We did! It was really fascinating. This is a very comfortable sub also--good ventilation and not at all claustrophobic feeling (my daughter suffers and was fine). The guides were helpful and personable and we saw so much! My husband says this was one of his very favorite things to do and he would do it again.
RCCL Nordic Empress 1993
RCCL Nordic Prince 1994
RCCL Explorer 2003, 2005
RCCL Navigator, 2004, 2007
RCCL Mariner 2006
RCCL Liberty 2008
RCCL Adventure 2009 Read and post cruise reviews
We did it last Feb....It was awesome...it's a nice short excursion (does not take up all day). I felt the price was worth it and it was very professionally run / organized. Once in a lifetime experience for my family.