I was staying very close to the harbor so I saw the ship while out on a walk in Battery Park. I went online for information (the desk was closed) and decided to book as the tour sounded great.
The whole thing was fantastic: the boat, the crew, the setting, the view, the atmosphere - everything. I thoroughly enjoyed the sail and didn't really want to get off at the end! The only thing that was less than perfect was the check-in experience, as the person doing it was not very friendly or pleasant. However, once this was done, everything else was great and I would highly recommend this tour.
If I'm ever lucky enough to visit Manhattan again I would book this again, without a doubt. Fantastic experience.