We enjoyed our night at Kristie's tree house. The proximity to the volcano national park is a plus.
The house itself is exactly as described on the pictures. Unfortunately, the day of our stay was a cloudy day and the solar panels didn't get a lot of sun, we hardly used any power in the evening but still could just get enough power the next morning to make 2 cups of coffee. The overall experience is a kind of camping one as you are middle in the nature (with its animals and their noises), you need to household with power and energy and you are depending on the weather as it go a bit cozy in the evening and our bed linens got little bit damp.
Kristie provided us with water and some snacks upon arrival which we really appreciated.
Overall, we think it's definitively a very special accommodation and experience. But we would not recommend to stay for more than one night.