Great! Took about 3 1/2 hours to get all the gang together to getting off the snorkeling boat. Water was 64F but warmed up quickly. There were cheap snacks and free water on the boat with all equipment needed for snorkeling. Native English speaking workers who gave great advice, and were very helpful. Don't drink the sea water as yummy, clear blue, and candy-like it looks! It's only the 5th saltiest water in the world... no this did not happen to me.
Advice in Gran Cayman... DON'T GO TO ANY COFFEE SHOPS HERE. ASK for the price of things. $10 for two small drip coffees=terrible.