Generally it is a fantastic place to stay in Big Island. Would like to reconsider this place next time!
Located in the north-west of the island, the unit is in a complex which shares beaches and other facilities with high end hotels nearby. You may have privilege to make dinner reservation with those hotels restaurant if you tell them you live in the complex. The private access to the nearby Mauna Lani Beach club is terrific for families and snorkeling beginners. I went to beach for fun almost every morning. The location is good for kona, mauna kea observatory, and those gorgeous valleys in the north side of the island. Far from Hilo and volcano (2+ hours driving). The weather or climate in this area is dry and warm compared to the cloud forest area in the south.
The unit is pretty clean and well equipped. Besides full household stuff, equipment for snorkeling, beach chairs, towers, toys for beach, etc, are also provided. A guidance for the activities and quite a few brochures about the island are also provided. The kitchen is wonderful and the master bedroom and bath room are huge. A crib for kids is also provided. It is pretty good for a family of four or two families with few kids. A big LED television with built-in Apps. If you would love to watch streaming movies at night, this is a big plus.
The check-in process is very smoothy. We arrived later around 10:30 to 11pm and got real-time support by text. You can get support either from airbnb messages or from their site (local) support by email, though the local support is not that promptly (but it is ok since most of things are worry-free).
The major issue is the internet. The router often loses the internet connection. We had to reboot it from time to time. A little bit annoying but still tolerable. Experienced power outage once at night and the unit does provide flashlight in kitchen and bed rooms. Also experienced earthquake once for a couple of seconds (degree 6.2). Yes, it is Hawaii!