I stayed in Kauai for 10 days and was travelling solo.
The appartment is really spaceious and super clean. Being not used to this shower system, it took me a while to understand how it works.... that one has to pull it out while turning around. And push it back to stop. But you couldn't wish for something better when you are a couple and like it calm. It just takes 5 min by car to the beach or shopping, restaurants. But you better have a car. Walking takes much longer.
However if you are travelling solo and / or prefer a bit more contact to people, I wouldn't recommend an Air BnB like this, since it is very calm there and you hardly see someone.mainly locals live are there.
I would definitively come back with someone again.