WOW! It's gr8 to get an answer since I first posted in October. My husband and I took our first cruise last January and are totally hooked! We went on RCL - Western Carib. The color of the water is like nothing you have ever seen before.....We have reserved a clamshell and booked a snorkeling excursion on HMC. I got hooked on snorkeling, too! Stay in touch.