We really enjoyed our stay at Christine's house! The house itself is absolutely gorgeous, and so peaceful and private. We loved the outdoor shower--the only time we used the indoor shower was the first night when we got in late. The huge lanai was always we started and ended our day--always a nice breeze, and it was fun to watch the geckos play on the railings and inside ceiling of the lanai every morning.
Our hostess Yvette was very helpful and responsive. She called the house the morning after we arrived and gave us a thorough rundown and recommendations of things to do and see in the area. We didn't have any issues at all during our stay, so there wasn't a lot of need for communication overall.
The location of the house on the Big Island is significant, something travellers will probably really like, or really dislike. The area of the house--really the whole southeast area of the Big Island--is not touristy at all. This makes it very peaceful and quiet.....but it also means that you have an hour drive from most of the things you would want to see (into Hilo, Volcanoes NP). We also found the restaurant options in Pahoa (the nearest village) to be pretty "meh". (We bought groceries and cooked breakfasts at the house, and eat out for dinner.)
Another interesting part of the location: it was in the middle of the areas that have been completely changed by the Kiluea lava flows of the past few years.
For us, this quiet stay was exactly what we needed, and it worked really well for us because we spent a few days in Honolulu after our stay at Christine's house, so we had a great mix of peaceful and busy to round out our trip.
I would highly recommend Christine's house if you are staying in the Hilo area.