To summarize our whole experience into one shortest sentence: just book this cozy studio and you won't regret it at all.
Carol was so responsive long before our trip started. She and Michael answered so many questions regarding where to visit (and how to get there) from Ocean View. They recommended many wonderful places (a few of them were hidden gems from the general public) and we followed their suggestions all the way. I must say that, if you were running out of time making detailed plans on the Big Island, you could always talk to Michael for some decent time and all of a sudden your next few day's tourist plan would been exposed to you.
In terms of the studio itself, the BEST ever! I have been staying in many airbnb rooms/houses before and none of them was even comparable to Carol's studio in my opinion. If all Airbnb places kept up with Carol's standards, I'd thought there wouldn't be hotels any more. Carol made sure that nearly everything you need for a trip has been prepared in the studio upon arrival. Her notes here and there made sure that you understand how to "operate" in the studio. The freshest eggs and banana bread in the fridge were phenomenal and you'll have a larger chance to miss it if you stayed somewhere else. I could keep talking about how great Carol's place was and will be, but without you even trying to stay for a night or two, all my explanations would be merely plain. I thank Carol and Michael for keeping this little paradise a wonderful "home" for us travelers and I will surely visit it again the next time we visit the Big Island.
P.S. the outdoor showing was indeed fantastic when the sky was clear. You shower under millions of stars; how amazing was that. The elevation of the studio makes stargazing unforgettable. We drove to Mauna Kea the other night trying to see the Milky Way but returned with no luck. On our last day, early in the morning when we had to drove to Kona Airport to catch an early flight, we saw this marvelous stretch of Milky Way laying out there and I almost cried. Such a surreal feeling. Finger crossed on future travelers with clear skies and dry air=)