Our stay at Don's place was really great. The location is incredible for almost anything you'd want to do in Kona, and the apartment had all we needed. The apartment complex overall has plenty of amenities.
The only issue with our stay was a mix up in our checkout date! It meant I was locked out of the room, and reception couldn't really help as it's an AirBnB operation. This did get solved quite quickly, though was pretty stressful!