My best friend and I had a great time staying at Olivier's place in Waikiki. The first thing you should know is how ideal the location is -- it's literally in the heart of Waikiki, and you are walking distance to all of the main attractions.
Olivier was a gracious and responsive host. He was off on holiday, and had communicated the check-in instructions very thoroughly. We were able to check-in and out with a breeze. If you're thinking of renting a car, the building has it's own garage, and Olivier was able to provide us with a coupon discount to save on the daily rate (the parking prices in Waikiki are no joke).
In terms of the space, it's clean and has all of the necessary amenities to make your stay in Waikiki enjoyable. The apartment can comfortably sleep two, and the couch is also quite comfortable. The building has a lot of great amenities as well -- BBQ grills, pool, spa, sauna, fitness room -- and you get access to all of it.
Overall, I had a great time staying at Olivier's place, and would recommend to fellow budget travelers that don't want to break their bank over some accommodations in Waikiki.