A couple of weeks ago, we signed up for a dinner cruise with Sunset. It was $89/ per person plus taxes. We got there early and waited in the parking lot. There were a few barrels to sit on. This info is for people who can't stand for very long. You must be there by 6:00pm, boat leaves at 6:30pm, and it is a 2 hour cruise. Parking is across the street in a lot or on the streets.
There are 2 levels: lower deck where the dining hall is and the upper deck with a small bar.
Dinner was a buffet style with fish, chicken, veggies and dessert. Nothing fancy and was average tasting. Free drinks: red, white, rose wine. I don't know about cocktails but they did serve them.
We didn't see any dolphins or manatees. It was just a boat ride out in the ocean to see the sunset and then return back to Key West. The DJ played island music and he had a good voice!
Nothing exciting happened...it was a nice pleasant dinner cruise. The servers were attentive to all guests. We relaxed and enjoyed ourselves.