If you have only a party of four or less, the Whale house is pretty nice with only a few quirks. The two bathrooms are only accessible through the bedrooms. The bathrooms have no curtains in the windows, so have no privacy from guests walking around the deck. Turning on the lights was a bit of a scavenger hunt when we arrived after dark. Most of the lights are controlled by the ceiling fan remote controls, and there is none mounted by the entrance door. When we arrived we tried turning on the table lamps, but several of them had dead bulbs.
For a larger party that needs to use the downstairs, it is not nearly as nice. The downstairs has not been updated for a long time. There were stains and tears in the carpet in one of the rooms. The downstairs bathroom is only accessible through the bedroom with the single king, so if people are using the room with the king bed and sleeper sofa, they need to go through the other room to get to the bathroom. There is no internal stairway, so people must go outside to go up to the kitchen/dining/living areas. The outdoor stairs are covered and were dry when the wind wasn't blowing the rain too hard. The downstairs bathroom is not up to the same standards as the other two bathrooms. It is tiny and has a roughly 30" shower stall with a cheap curtain rather than the nice glass doors in the upstairs baths (there probably wouldn't be room in that bath to open a shower door anyway). The bathroom itself doesn't even have a door, just a curtain between the bedroom and bathroom. There was a large ugly pipe running through the bathroom that was quite noisy when it was raining hard. It seems to rain most nights in Hawaii and is usually sunny during the day which is great, but having a noisy pipe attached to the downspout running through a bathroom with no door separating it from a bedroom seems like a mistake. We also experienced a large puddle in the carpet between the bathroom doorway and the bed. The puddle was not caused by water splashed out of the shower. Hopefully the host can figure out what is causing it and get it fixed, though he ignored our communication about it during our stay and did nothing to help us keep our feet dry.
Also, with more than four guests, seating for meals may not be very good. The small dining table is great for four, and you might get six around it fairly comfortably. For our larger group of eight, the table on the lanai was usually quite nice, but at times during our stay, it was raining and the wind was blowing hard enough to make the chair seats wet.
Be sure to tell the host ahead of time what your desired sleeping arrangements are. We had 5 adults and 3 children. The ad lists 4 king beds and a sofa bed which we intended to use. The host apparently assumed that one kid would be sharing a bed with an adult, so they didn't provide linens for the sofa bed until the day after we complained. Our son had to sleep on beach towels for one night. Luckily there were no accidents or spills that required additional linens since there were no spare sheets in the house.
The kitchen was adequate, but there were no zip-lock bags, plastic wrap or aluminum foil for storing leftovers. We even had to buy our own trash can liners for the kitchen.