The check-in process was the best I ever experienced in any Airbnb property, like in a nice hotel: they gave us our electronic keys, brought up our stuff in a baggage cart and even gave us a quick tour of the condo. Check-out was also simple and hotel-like: we just dropped our keys at the front desk.
The host team (Louie, Meg and especially Nadia) were very polite and responsive, quickly helped with every question we had.
The apartment is indeed as good as it sounds from the description. The kitchen and bathroom amenities were clean and modern, the beds were wide and comfortable, the common areas were spacious and well furnished. We never felt like the place lacked anything that we got used to at home: there was a dishwasher, washer/dryer, etc. And it also had many vacation-specific things: beach towels, chairs, body boards, etc.
The building itself is new and luxurious, so I'm sure most of the things above could be said about many condos here. What made this particular condo stand out was the incredible top floor beachfront lanai. We had breakfast on it every morning looking at the waves in the lagoon, and that alone was absolutely worth the price we paid.
We loved Ko Olina, and would love to return to this condo again next year.