We had a very pleasant stay at their place!
When we arrived everything was clean and we even had a little welcome basket with a personal note. Very nice!
We didn't see Grace and Lucia that often but communication during the whole time was perfect.
The area is nice but I didn't spend that much time there so I can't say that much about it. Access to the city is fine.
All in all I would completely recommend staying at this place if you are looking for a calm and nice stay close to San Francisco.