For the solo traveler looking for affordable, no frills lodging, Samuel's place is great -- as long as you know what to expect. The accomodations are simultaneously basic (no towels or toiletries, so bring your own) and thoughtful (mini-fridge, private bathroom, cabinets, in-room AC unit). The bathroom is small and can feel cramped, so if you need a large vanity to spread out your belongings, look elsewhere.
Sound does travel from both inside and outside the apartment (being in the heart of downtown Honolulu, the street sounds are loud). However, the AC units in both the shared space and bedroom will drown out much of the noise (or bring ear plugs!).
Samuel is incredibly responsive, hospitable, and flexible with specfic requests, including storing luggage after checkout. And the location was killer -- easy walks to multiple beaches, public transportation options, and stores. I don't regret staying here, especially considering how expensive the alternatives were. Thanks, Samuel!