We stayed in 503 (KRV) and 507 (GRV) last month, and would recommend the area. Close to breakfast and a lot of fish activity outside the villa. Saw reef sharks, rays, and schools of fish everyday.
Our prior stay in was an OWV and we loved it, but would not pay extra to move from the RV if on a points stay. Only negative on the RV versus OWV was mosquito activity. Do consider bringing bug spray.