I've been to many airbnb in many different countries and in over 3 continents. This has to be hands down the best airbnb i've stayed at. Ana was a very responsive host and she really took care of things. The building manager Lori was beyond excellent too - super nice and helpful.
The location was the best anyone could ask - right next to the sea (like literally!) and that too at the best whitesand beach Kona has got to offer.
The ocean sound was totally fine when sleeping and we had no issues. In fact it really helped us fall asleep. More importantly was the stunning sunsets you could catch everyday, along with the rainbows (you're in prime rainbow country.) And of course the most stunning of them was the moonsets! (gotta wke up at around 4-ish am to catch them).
The wifi was really good and they have Roku at home too. We had no issues with the internet at all and we did a lot of video conferencing work calls.
The ROOM soundproof box was an amazing addition. As my wife and I were working remotely, whenever we needed to take a work call, we could just do it in total isolation without disturbing each other.
The airbnb has everything you need to enjoy your beach stay - beach chairs, mats, beach umbrellas, etc. Oh and did I forget to say that you can swim alongside turtles and beautiful bright yellow fish right in your backyard.
They have a really nice pool too (and which also has great wifi) - and we worked there in the mornings before hitting the beach in the afternoon.
Overall it was an amazing studio apartment and can't get a better place or deal if you're in the Kona area.
We stayed for 28 nights and my only regret was not extending another month :(
[Side note - Kona/Big island-specific tip: You definitely need a rental car. Please book in advance of your trip. The Big Island has a big shortage of rental cars. ]