We LOVED the Sunbreeze. They were amazing and we did not want to leave. We were there for about 12 days total - we got there a few days before our guests to prepare. We got married on the beach right in front of the hotel and had the reception at the Blue Water Grill. It was an amazing time. They can also help coordinate a stay for you on the mainland as well.
We set up two excursions for our guests - one a manatee watch/snorkeling trip and the other was on the mainland for cave tubing and visiting the Mayan Ruin Altun Ha. Everyone had a great time.
Feel free to PM me if you have any other questions or want more information.