We stayed at the Lanikai Tree house and we really enjoyed our stay. The house was well equipped and spacious. The owner was really helpful sharing tips on where to go, eat and so on.
During the first days we had problem with the water pressure in the shower, reported it and after perhaps 30 minutes a man arrived fixing the shower. That is service.
It is roughly a one minute walk to the water and if you want some beach as well it is a five minute walk. The walk to the restaurant, opposite the Kailua beach park, is about 20 minutes and their drinks are lovely.
Do not forget the walk up the hills to the old WW2 pillbox(es). In the morning when the sun is rising the scenery is lovely.