Sara was an amazing host who went above and beyond for my stay. She made my impromptu trip to Hilo worth it with her amazing hospitality and great conversation. Sara is as involved as you want her to be. If you need recommendations for activities or just need to organize your transportation, she is ready to help. I explained my situation and she assured me she had my back before I even arrived. Make sure when you book your reservation, TEXT HER, just because the app isn't as reliable for notifications if she isn't directly connected to wifi.
As far as the accommodations go, the cabin is cute and nestled along her property. There is lots of land to explore, if that is your vibe. Even though it the cabin is essentially in her backyard, it feels secluded because of the luscious garden. There is no a/c, but it stays pretty cool throughout night and day with the small fan that is provided. If you run hot like me, I recommend packing small battery operated fan as a great travel buddy.
Some water is provided. You have a little marine toilet, outdoor shower, cute little lanai and a private space where you can meditate or eat your daily meals. The bed is really comfortable and make for a great night's sleep. Your are semi outdoors though, so just be prepare. There is a mosquito net above the bed which was really helpful and bug spray is provided. Also, flashlights are provided to make navigating at night possible.
A few things to note, you are about a good 40 minute drive away from the airport and downtown Hilo. There aren't many lyft/uber options, so either rent a car or contact Sara for additional options. I would definitely return, but would make more time to explore and stargaze at night.