We stayed for a week in Cathryn's house for a combined work+holiday trip. The house is as great as it looks in the pictures, spacious and well furnished and with a well-equipped kitchen. Cathryn is actually staying there herself every now and then and one notices that this is not one of the airbnb's just rented out with minimal furnishing to make money. There are also paintings from her all over the house (including a "work in progress", hehe!). Also the standard of the house is well above many places I have seen in Hawai'i. The frogs get a bit noisy at night but it adds to the charm of a tropical place, we also had a cute green-blue gekko living in the house.
We did not meet Cathryn in person, but communication with her was very efficient, quick and she was always helpful and informed us about anything that would come up. Great host!
The only two little drawbacks of the house are that it does not have aircondition and even with all the fans on and the windows+lanai doors open it did get very hot. And it is a little far from Hilo and the main ring-road, we had troubles not falling asleep driving home in the evening.
Despite those small details I would definitely consider staying there again and I can really recommend the house because it's really well done and comfortable and even suited for a larger group (up to 3 couples).