We had a fantastic stay on Kailua Beach.
The cottage was comfortable for 4 adults plus 1 toddler, and included all of the amenities we needed for a week long stay. The unit was well maintained, and very clean. Given the tropical climate, we were surprised how few insects we encountered inside.
The location was excellent, directly located on a very nice part of Kailua Beach (which itself is around 2.5mi long) not far from the Kailua Beach Park. There isn't much of a view from the unit itself, but fortunately the beach was just across the lawn.
The only drawback is that the solar hot water system wouldn't work on cloudier days. As a result, we had several cold showers. With some help from Misty, we were eventually able to figure out how to manually switch the hot water on, but there was a bit of struggle since the system would switch itself off after some time. It would have been nice if we were informed of how it worked ahead of time.