This place is passable, but not great. My issues were 1) the bed was horrible - very creaky, with an uncomfortable mattress; I ended up sleeping on the couch one night, 2) the hosts left notes warning to not leave food out and to keep the door closed or else there would be bugs, but even with no food we found bugs -- including ants crawling all over our earplugs, 3) the place seemed unfinished, or furnished with thrift store furniture, and 4) the hosts weren't particularly helpful when asked for advice.
The pluses are that the location is very convenient for being in the Kona area, and quiet at night, and there's an easy parking spot. There's plenty of space in the rental, water pressure was good, and there is privacy.
Overall, this place is okay/passable, but not great value for the price; I got a sense that it was built as cheaply as possible, so that the hosts could list on airbnb and upsell gear rentals and other services. I would probably not stay again.