Awesome house! We had a wonderful vacation. The house fitted all six of us plus a 1-year old baby. The backyard is enormous and includes a lot of great places for relaxing (at least five sunbeds and some chairs in the shade) as well as a playground for children. All the stuff you might need for beach, babies, older children, or anything else is there. Many board games and movies. The movie theater has a gigantic screen, fits ten people and has two massaging chairs. The spa is just wonderful!
The location is also nice: the house is on a hill with a good view on the ocean and sunset. You can even see the other island's (Maui) mountain top on some bright mornings. There is a local village market in ~5 minutes drive where you can find all you need.
Everything is very child-friendly. Several sandy beaches with lots of shade are within 20 minutes drive. The best for our taste was the Samuel Spencer beach (lots of natural shade, no waves, sand, all facilities). Hapuna beach is great as well.

I'd definitely recommend this house to a large family with kids (or two small families)