I've used Airbnb twice before in the past year and had great experiences with both, so convinced my wife to give it a try over the North Kohala resorts we've used on our previous three trips to the Big Island. The resorts are really nice, but having to pay for parking on top of already (IMO) stupid-high prices simply became too offensive to accept.
Pros: Great location. Easy walking to the beach but far enough back from the street so that you don't hear the ocean-front traffic. Excellent up-front communication from host who provided clear directions, access, and use instructions. Rooms were clean, spacious, and tastefully appointed. Nice ocean view from the large lanai. Very comfortable bed. Having two bathrooms is a genuine luxury. Both bathrooms and kitchen were well-equipped and well-stocked. In-condo washer/dryer is a huge plus. Ceiling fans worked great. Assigned parking is conveniently next to the elevator. The condo association has strict, but completely reasonable, quiet time rules which we greatly appreciated. We hardly heard anyone at all, and never during quiet time. Nice pool and hot tub. Not sure why anyone would want a sauna in that climate, but there's one of those too, if you want it.
Cons: We never saw anybody in the condo office during the whole week. I understand they aren't responsible for individual condo issues, but that means you are up to your own and whatever resources the host has provided for assistance. We ran into a minor snafu during check-in (absolutely no fault of the host) and started working the designated contact list for assistance. Got a callback shortly afterwards from the host's daughter, which based on her phone number, was US mainland east coast. All worked out fine, but felt sorry for her because no check-in prior to 4PM meant a late night call for her. We also encountered a newly arriving couple towards the end of the week who were having problems finding their condo. We gave them directions as best we could, but someone in the office could've easily helped them, if they'd been available.
A couple of minor notes (not really a "cons"): We left the lanai doors open and bedroom window cracked for ventilation and it was quite comfortable even without ever using the AC. A surprising amount of local wildlife works the overnight shift, so It took a couple of nights to get used to the periodically bleating goats who were apparently clearing brush on one side, and the boisterous 3AM birds on the other. We accepted It as part of the local charm.
The nearby public beach is popular with both tourists and locals so it can get a bit crowded. Especially on weekends. Adjacent parking is abundant, but we did see it full a couple of times. That's probably not a concern for you since it would take longer to load and move the car than walk, but might be a factor if you invite visitors.
Bottom line: Stay again? Absolutely. Great host. Great condo. Great location. Very convenient access to nearby beach, stores, several dining options, downtown Kona, and the airport without being in the hectic and crowded tourist zone. It's wonderful to have the flexibility of either going out or staying in for meals. That said, It's important to remember that part of the Airbnb experience is you are often staying in someone else's home. In this case, a very nice home. As at least one previous reviewer noted, there are many personal decorations which add to the tasteful "homey" feel. Hence, this condo might not be the best fit for families with small children, who are naturally curious and want to touch everything.