Kate was an amazing host. It was our first time using ABB and we definitely think that Kate set the standard very high for us. The tree house was immaculate. The design is gorgeous. We arrived late at night and to be honest it was quite scary (I am a big wuss when it comes to the dark). However, once we settled in it was easy to focus on the beauty of the tree house even at night. I definitely recommend to book more than one night so that you can really enjoy the tree house. The island of Hawai'i is beautiful. We definitely enjoyed our stay on the big island much more than any of our stays in Oahu. If you are worried about comfort... don't be. Kate left things for us that we didn't even realize we needed. Also, the shower was so beautiful an relaxing! We hope to return soon.
Best of luck on your travels!