My wife and I and another family member took the 4:30-6:30 sunset sail. It was absolutely wonderful and something we will do again the next time we vacation in Key West.
We liked that this was a small tour (only about 20 people were on board), the music was not blasting (it played from a small speaker), and there was no narration of any kind. Just a really great crew who gladly answered any question, and served a nice selection of wine, cheese, and crackers. Beer and soda was also available. Captain Brian assisted by Logan and Rose made this sail a wonderful experience.
We enjoyed the views, took lots of pictures, and enjoyed the absolute serenity on the water. If you're looking for a more boisterous party boat experience (been there, done that) this is not for you. But it was perfect for us.