The location is truly fantastic: ocean views from most rooms, walking distance to both the marine reserve tide pools and a challenging (perhaps unofficial) steep hike down to the beach. We enjoyed the vintage style of the home, and lack of privacy due to the upstairs rooms being open to the main house wasn't an issue for us. The beds were very comfortable. Check-in/out was really easy.
Make sure you read the description carefully and fully before booking, to catch additional fees. There were some unusual ones for us, or at least unusually applied, that caught us off-guard and added hundreds to our one-week stay.
There were some cleanliness issues: the sheets didn't appear to have been washed before our arrival (hair), mold in the upstairs bathroom which is almost impossible to avoid given high humidity and poor ventilation, and the couch slipcover was a bit grimy. Everyone has different tolerance levels for these things, though, and aside from that the house was clean enough. We struggled to find a way to air out the house, which in a beachside location is frustrating, due to all the windows being stuck shut.
I wouldn't recommend this home for young children: the back porch is completely open to a 3' drop both at the edge of the structure and in cutouts. Our youngest (3.5) did tumble off once (he was ok, minus some scrapes and tears), and broke a precariously-balanced pot on his way down. We of course informed the host immediately and reimbursed him for all three pots so he could restore a matched set.
Overall, we enjoyed the stay but wouldn't book again, due to the fees and cleanliness issues. Moss beach itself? We're in love, and will definitely be back.