Riaan and Lisa were great hosts, they gave us ideas on what to do in Hilo and around the island. The cabin was really nice, breezy, and clean. At night you get an excellent view of the stars and can listen to the coqui frogs sing. The property was beautiful and well maintained. Staying in the cabin gave me some of my own ideas.
The kitty was an excellent roommate and the outdoor shower was great. There are lights in the cabin, but no electricity so bring a charge block if you are planning on using your phone for an alarm. They have space in the big house to charge your electronics if you don't need to use them in the cabin. They also have flashlights to borrow because it gets really dark out there at night. Don't forget the flashlight in the cabin or you will end up using your phone trying to navigate if you return after dark. The only recommendation I have is not about the AirBnB, if you plan on doing stuff in Kona, it might be better to split your trip, Kona is a 2hr drive.