Stayed there a few times in the last few months. The balls are there, the scrub boat collects the fee each night and the pennants on the buoys that I have used seem in good condition. There is often a decent breeze across the field from the east so there is a lot of pull on the mooring, but we haven't had any problems. North swell this week didn't seem to cause an issue either. Marina Cay itself looks to be under some level of construction still - as the real estate has apparently been leased for use by the Scrub Island Resort.