We are a family of 4 and stayed at Vinny's apartment for a week. It was a great place - being on one of the highest floors in Waikiki it had a great ocean view in the living room and diamond in the bedroom; Vinny provided all the essentials such as towels, a snorkelumg gear, soap, WiFi etc.; location was close to the main part of Waikiki, also near the best valued udon restaurant you can find in town.
One improvement I can suggest is a fan in the living room for the hotter months.
Overall, highly recommened.