We enjoyed our stay with Hing and Yuyu. The apartment is compact but very accommodating. We (a couple with a baby) fit there nicely with all our stuff for a 6-night stay. The kitchen area is quite spacious and full of utensils and the beds are comfortable to sleep in. We enjoyed having breakfast on the balcony overlooking a green area below and a bit of the ocean at a distance.
The apartment is very centrally located with multiple shops and restaurants around, and you can walk to Waikiki beach in just 10 minutes (there is a path through Hilton hotel open to general public). We purchased parking from the host for $12 per night and I highly recommend you do so if you plan to rent a car. It is next to impossible to find parking elsewhere and if you purchase a parking spot from the building management directly, you will have to pay $20 per night and you'll have to leave it before 7 am and come back only after 4 pm. There is a laundry facility in the building available to use for a small fee which we found very useful.
Hing was very responsive and helpful with all our queries and it was a pleasure to stay in his apartment.