Stayed here in October 2019, is a lovely property, but as others mention it is a long way from Naha, so a car or expensive taxi is required.
The Marriott is a 5-10 minute walk away and has a good Happy Hour so that’s worth a visit if you want cheap drinks. Particularly as they are still running the member discount for food and dining in Asia.
The golf course is beautiful and well worth a round. For food we ate at Gusuku a couple of times and the local dishes were fine, but nothing special.
As an ambassador elite member we were looked after very well, with a free room upgrade, bottle of LP on arrival and a complementary afternoon tea. Very impressed with this part as often recognition at RC is hit and miss.
The local beaches are nice, but lots of signs about box jellyfish etc so swim in the sea at your own risk!
Hope this helps