We had a great time. Central to Waikiki so walking was easy, everything was nearby. View of the beach and lagoon area was fantastic. Friday night was fireworks. Spectacular. Every other night there was a luau on another rooftop that we watched, with our drinks & pupus, so we are well versed in the hula, fire dances, and a few Hawaiian songs. Delightful!
We thought we'd need a car, but your location was so perfect we didn't. Ala Moana Marketplace to the Royal Hawaiian, all walking or a simple bus rides there. (Loved the on-off for a bus tickets -- they give you a 2 hour window to ride anywhere for one fee/ticket.)
Comfortable bed, nice sized kitchen for light breakfasts or reheating leftovers and snacks.
All in all, a great spot for a great price and a wonderful view.