We stayed at William and Kelly's cabin for three nights while visiting San Diego. It's a quiet neighbourhood, a little drive from central San Diego, but the view is really beautiful and we loved sitting on the terrace and having hummingbirds flitting around us - idyllic! As others have noted, you can see and hear the freeway, but if you close the windows and curtains it blocks the sound out at night so it wasn't a problem for us.
The room is very small but it's been decorated and equipped beautifully. The bed was very comfy and the addition of cookies and a fridge-freezer stocked with coke, water and ice cubes were really thoughtful. Would definitely recommend.