We stayed for 6 nights and really liked this place. The deck faces northwest onto an immaculately kept courtyard that includes the pool, hot tub and bbq grill, but is far enough away from those amenities to be peaceful and pretty calm. Inside, the condo is far bigger (and cheaper) than most hotel rooms, plus it features a full size fridge, a microwave, a toaster oven, a nice sized kitchen sink and, if you poke around a bit, a hotplate, a George Foreman grill, a full set of mixing bowls, dishes, seasonings, a set of knives and some other cooking equipment, and plenty of utensils. The shower is great. The double bed, the couch and chairs are all very comfortable. The tv is plenty big and connected to cable. The dining table is just right for 2 or 3 people. There's plenty of space for clothes in the cabinets. We also found snorkeling gear, a beach umbrella, rain umbrellas, a baseball cap, tote bags, and laundry detergent. Marni has stocked the place very thoughtfully for everything you might need.
The condo is on the second floor of the Kona Islander, a condo complex that includes both vacation rentals and full-time residents. There's a shared laundry room on the ground floor--$2.75 per load in big washers, something like $2.50 for the dryers, and you can pay through an app with a credit card in case you don't happen to have a roll of quarters in your pocket.
Parking is first come first served, but good spots were available almost every time we parked. (Of course there was also a shortage of rental cars, so I'm not sure what it's like when they're back up to full speed.) Note that once you've checked in, you can enter the complex through the rear gate on Ali'i Drive.
As others note, the location is excellent, easy walking distance from beaches, attractions, and restaurants. You can walk tondinner and then get gelato and watch the endless beach volleyball matches on Ali'i, across the street from the ocean, a block south of the condo.
The only down side was that the air conditioner became noisy. We reported it to Marni pretty late. She apologized and gave us a credit and set about getting it fixed. Overall Marni was very attentive to our needs and responded almost immediately every time I sent her a question.
We would definitely stay here again.