Jost is one of the smallest of the BVIs and has a resident population of about 150 ppl. It is a very quiet and relaxing place to stay. There is some excellent diving off the North Shore, Green Cay, off Big Tobago Island, Watsons Rock, Mercurious Rock etc., but I would say that it is largely condition dependent. Colin runs a basic operation, but it is nothing fancy and with none of the frills of a larger operation. I personally have not been out with him, but I have dove many of those sites. In all honesty, if you are looking for a true "dive" vacation, you might be better served going to one of the other BVI islands or even into the USVI--St. John or St. Croix. Hope this helps. Feel free to PM me if you have more specific questions.