We just did the Blue Lagoon Dolphin Encounter excursion last Wednesday. We took a boat from the Mariner of the Seas to Blue Lagoon. It took about 20-25 minutes. But it was a gorgeous day, and you go by Atlantis so you can see it from the distance. The captain gave out some information (tour guide type stuff). However, we couldn't hear him due to all the noise.
The dolphin encounter experience was more than I expected. You sit with your group on one of four sides. Our side went first. Each person got to hug the dolphin, kiss the dolphin, feel the top of the dolphin, feel the underbelly of the dolphin and so forth. Once your group is done, you then leave that area and can go hang at the beach. The water was so clear.
We were late getting off the boat because of Immigration or something to that effect. We caught the first shuttle back from the Blue Lagoon (1:30 p.m. I think). We would have stayed on the beach longer if my daughter didn't want to get back to catch up with some friends she had met on the boat. When I got back, I had time to go shopping at some of the stores in Nassau.
Atlantis looks gigantic.
I bought this excursion before our cruise, when it was on sale. I think it was worth it.