I stayed in the Alex's place for 6 weeks. It's one of of the rental rooms in the house, not an entire place, but the room has own bathroom and a little kitchenette so it's pretty isolated.
Location couldn't be better - quiet residential street, next to a park, short walk to the beach and Waikiki restaurants and bars. Safeway supermarket is not far. It was very easy to get around without a car.
Alex was very responsive and supportive to all requests, normally replied within an hour, but no communication outside of that.
The room is very basic, although has minimal nessesary items. I really missed a full kitchen though as even making a basic snack or breakfast was challenging (no knife or cutting board; there's a coffee maker but no cups only glasses etc.). The only mirror is small and in a dark corner so prepare to never see your real face lol
Overall vibe is rather negative - there are signs everywhere starting from the entrance door of things that you shouldn't do (e.g. no loud noise, no visitors etc.). It was overly compensated by great Oahu's general vibe though.
Internet was rather unstable - I work remotely and had to go to the cafe for online meetings due to dropping connection, but was okay otherwise.
Free unlimited laundry was a huge plus.
Overall this stay is a great value for affordable accommodation, and the location is unbeatable. I would stay again if budget is a constrain.