The house is 2 units -- a bigger main level and smaller lower unit -- that are both reserveable. Both are well appointed -- plenty of towels and bedding, nice touches like granola and coffee -- and they both have somewhat private patio space in addition to the shared patio space. Picking fruit and veggies off the plants in the garden was a great addition to our breakfasts!
The house is also within walking distance of just about anything -- 5 minutes to a corner market or RiteAid, maybe 10-15 minutes to OB beach. Other OB locations might mention being in the flight path, and those planes can definitely be loud, but they weren't as noticeable at this location. So being slightly farther from the beach pays dividends in terms of peace and quiet.
Communication with the host was also excellent, offering plenty of OB advice.
My family did end up booking the whole house, meaning one reservation for the main unit and a 2nd reservation for the lower unit. This worked for us as it gave my family plenty of sleeping space and my mother her own private space for when we all needed that. As the listing says, any movement in the main unit (especially the living and dining space) can be heard in the lower unit, so that's definitely something to keep in mind.
overall, I'd highly recommend this place for anyone looking to stay in SD.