I did 3 tours with Mar Y Sol company and I absolutely loved ALL of them. I went to the Blue Lagoon, Cayo Arena (Paradise Island) and Whale Watching. They were fantastic at all of them. Excellent communication throughout, took me to so many places beyond those listed above (it was almost a whole day excursion), very comfortable buses, very nice drivers and guides and a great lunch buffet. Would definitely recommend this tour company to anyone visiting northern Dominican Republic!!