Was on the Explorer II Summer of 2007..... very good trip, very well organized. Boat manager (Jennifer I think her name was) meets you at the airport and drops you off when you leave. The itinerary is modified each week depending on conditions and reports from other boats of successful sightings (eaglerays, sharks, etc.). Divemasters were always helpful and enthusiastic (which is not always the case). Meals were well above average. We have been on 25 different liveaboards and found this to be one of the best values in the Carribean. A no brainer in my book.