Rey is a wonderful and communicative host and I stayed there for a month. The apartment is just as advertised but may not be for everyone so make sure you read the description! I think it would be perfect for popping in and out during your visit to Hawaii. I had a good stay but a few things to be aware of:
1) bathroom and shower didn't have doors, just curtains so privacy can be tricky with other guests in the backyard / studio
2) outdoor kitchen has a basic kitchenette and stuff but you probably but you cannot do extensive cooking or keep food there for long before flies or other animals come by
3) noise: while the neighborhood is super quiet, you can really hear the neighbors through the windows (not the fault of the host of course, but something to be aware of if you plan to stay in the apartment during the day for work)
Things I loved about the apartment:
a) the location is amazing and super quiet
b) the outdoor garden was great for working remotely
c) bikeshare station right outside the apartment
d) great selection of restaurants within walking distance
Hope this helps!