We stayed for two nights in this rental. Our group (two kids, two parents, one grandparent) really enjoyed having two separate spaces. The kids were also delighted by the toys and the pheasants who came to visit in the mornings. We all enjoyed the spectacular stargazing when the clouds cleared.
The location is wonderful. Very close to Hawaii Volcanoes National Park and to local restaurants. Note that this unit is not very close to Hilo proper (about 40 - 60 minutes driving). I suggest bringing some groceries if you are able as there are only a couple restaurants in Volcano and the general stores have pretty limited selections. The kitchen has a full-sized refrigerator, pans, dishes, and appliances.
The unit can get chilly at night so pack warm pajamas and socks. We were happy to have electric blankets!