As noted above, perfect and reliable weather, great golf and other facilities in the resort (including, tennis, scuba, Casa for Kids, horseback riding and much more). Quite easy to reach from East Coast or Midwest, incredibly nice Dominican people and my family loved it at first sight.
We have been coming to Casa and this Villa for 30 years every Christmas holiday as well as other times of the year. Our kids have grown up here and made numerous friends (as have we -- interestingly more non-American's than Americans). The kids and grand children all view this place as home, more than our regular residence in NY