We really enjoyed our stay at Hana's place. The location was central to everything in Waikiki and the parking space is absolutely invaluable. The location is also great for getting out of Waikiki quickly for other Island adventures.
The kitchen is well appointed and the provided beach towels were an awesome touch.
Obviously, Waikiki is a busy place, and there is a venue with live music nearby and the hours seemed to vary. Running the ac at night was good white noise however, so not a big deal overall.