Staying in Sd & Z‘s botanic garden is a real adventure! The place is really clean and confy. Furthermore, you will find everything you need to prepare simple meals, so you can have a nice dinner outside on the terrace and enjoy the view of the stars. The location of the hud is not super central, so if you want to do some sightseeing (Volcano National Park, Hilo, etc.), you have to drive at least 1h. But this is not a big problem, and some beautiful black sand beaches can be found nearby.
I definitively recommend this place to everybody who enjoys a little adventure in a remoter place.
Best
Pascal