Highly recommend Ali & Kim's lovely downtown Kona apartments. They are super new, beautifully fit out and clean. Our 1 bedroom apartment was spacious and also had fold out lounge if required. Kitchen was well provisioned if you wanted to cook at home and full size fridge was a nice change. Having a laundry onsite (but not taking up space in the apartment) was very handy.
Complex is on a main road, so could get quite busy, but on the upside, the location was super convenient and only minutes walk to shops, restaurants and markets. Finally, the shared Lanai on the top floor of the apartment complex was a really nice space to hang out, enjoy a beer and watch the sunset.