Willa's Airbnb is part of the Kona Islander Inn, a set of privately owned vacation condos, and the Airbnb description is accurate--the inn and the studio indeed have a "sweet, old-fashioned" vibe, and the studio itself is quite thoughtfully designed and furnished (thoughtful additions like beach towels/chairs, extra bowls, clothes hooks, etc.). AC works great alongside fan and outdoor air/patio. Great location to experience the town and nearby food options as well as the farmers market. Perfect for experiencing Hawaii culture.
Front desk staff are quite friendly and provide you card keys for the rental.
Parking was not too bad to find, with plenty of spots in the morning/early afternoon (evening we usually lucked out on a spot); street parking up on Kuakini Hwy was not hard to find if needed. Make sure to show the provided parking pass if you are parked on the lot.
Overall, highly recommended!
P.S. Coqui frogs in the vicinity do sometimes make (pleasant) noises. If you don't like noises at all, then you might want to bring earplugs if you're staying in the area (not just limited to this place).