I had a lovely stay at Jeff and Karen's place. The location is in the heart of Waikiki, extremely walkable as it is minutes from the beach, on many bus lines, and with plenty of restaurants and other fun activities just downstairs.
The decor in the studio is really cute and appealing. You can tell they put some intention into giving the place some local character which I very much appreciated. As a solo traveler relocating to Honolulu, I probably spent more time in the studio than others vacationing here and it felt quite homey and cozy, rather than a boring hotel room or life-less rental property.
Communication with Jeff was quick and proactive when I had some difficulty with the TV and the problem was resolved without issue. Would definitely recommend staying at the studio if it's available!