We stayed here with two little kids, and the kids would give it 5 stars. As other reviewers have mentioned, the back yard is a great place for kids, there is a big yard to run around in, a swing, and a pond to fish in. Nani went above and beyond by putting out toys for our kids and sharing her kids Hawaiian-themed books. She shared eggs from her chickens, and fruit from the yard.
We (adults) gave this three stars because while they do say the back patio is shared space, but it is a bit more like their outdoor living room, right outside of the rental space. We would have been interested in spending more time outside, but they were watching TV right outside somewhat frequently in the afternoons. We felt like we were intruding in their space by being outside on the patio.