Mariel has 2 rentals in the same building, and I stayed at both while in Waikiki. Stayed at Islander's Hideaway the first night, and Ocean View the other nights.
Both rooms are worth the value purely for the location alone. Not even a 5 minute walk to the beach, easy access to ABC Stores and excellent food. I highly recommend the coffee place across the street for breakfast! Parking can be tough, but that's pretty much all of Waikiki. Easiest place for me was Mariel's suggestion of parking a block and a half away at the Waikiki Banyan.
Islander's Hideaway could use a bit of updating, but that's me directly comparing it to Ocean View. Ocean View has a much more updated and comfortable feel, plus a great view of Sunsets from the balcony!
I would easily stay at either of Mariel's rooms, but will try for Ocean View first if it's available. Mariel also had excellent communication! We will definitely be back!