Stephen's place is amazing, I'd highly recommend staying there.
We stayed 3 nights and we did 1 full day of hiking around the Volcanoes, 1 day driving around and visiting beaches and the location of the 2018 recent lava flows in Pahoa and another day we went to Hilo and the north of the island.
The location is perfect if you want to explore the national park and the east coast of the island. It's also incredibly quiet and embedded in nature. The place Stephen created is very modern and incredible if you want to relax. If I had more time in the big island I wouldn't mind just spending my days at his property relaxing, doing yoga or exercising by the coy pond listening to the sounds of nature.
The fridge and cabinets were stocked with all the essentials and Stephen got us some fresh fruits for our arrival. The kitchen also has everything you'd need, from coffee maker to food processor and cheese grater.
Washroom was very clean and the bathtub with hydromassage is a great feature - especially after a full day of hiking.
If you're not sure where to go and what to see - and even if you know - have a chat with Stephen. All of his tips and suggestions were really great - if you're there Sunday, go to the market in Volcano!
We can't say enough how much we enjoyed our stay at Stephen's place.