If anyone is going to the Marriott St.Kitts, be VERY careful with gambleing in their casino. It is licensed to a different company and they are unethical in many ways. The least of these is having their reps promise certin comps and then not honoring them and claiming that the reps are outside reps and not under their control. Also many of the games are not "fair". This is not Vegas, there is not the same type of oversight here.
I went there with some friends at the Invitation of the casino and we all agreed we would NEVER gamble there again.
However the property itself was nice outside of the casino and make sure to rent a car and drive around the island. You can also take a boat over to Nevis which is nice for a day.
Of course the inter-island flights to St.Marteen for shopping for a day are also very cheap.