Hello. We did the Ghosts and Legends tour in Key West a few decembers ago. It was offered through RCCL. I enjoyed the tour. You heard some interesting stories, and it was a great way to see the town. I like to hear scary/ghost stories, on a tour when I'm in a new place. The tour started at 9am, which was a bit odd. Every ghost tour I have ever done, started at night. So, I usually warm up with a scotch, to get my ghost vibe fine tuned.
But, I understand, on a cruise, that isn't possible. I am glad I did it. I thought it was worth it.