We stayed for a week and it was lovely. The view is amazing and the bed was firm but comfortable (but the fluffy duvet bedding was too warm for even January weather, without lighter blankets available).
It's almost more of a studio than a 1 BR, because the French doors that close off the bedroom don't block light or noise if one person gets up before the other. There are the basics of pots and pans and appliances, and it was helpful to have a rice cooker. Although the listing mentions salt, pepper and oil, there was only salt. I left a pepper grinder. Some spray Pam or olive oil is usually provided at the many places we've stayed.
Hawaii recently changed its rules regarding these kinds of private rentals, so we had to stay in Waikiki (our son goes to UH). Allow yourself extra time to not only get in and out of the parking garage ($28/day) but through the traffic and pedestrians to come and go. If we didn't need a car to see our son, we might have skipped the car rental.