Pros:
Yulin’s house is located in very safe and nice area of San Mateo. Behind the house is really nice garden where you can find lemons on a tree and squirrels running around :-)
It is about 30 mins to SF downtown by car, cca 20 mins by Caltrain (train station in San Mateo is reachable by car, not by foot). You can park your car near by the train station for cca 7 US$ for a day, one way train ticket is 6 US$ per person (2 US$ child ticket).
You have your own parking space in front of the house. Inside the house you have everything you need - washer, dryer, hair dryer ... the house is definitely very clean and nice.
Cons:
as for european standards house is not secured AT ALL. The lack of security made me feel a little bit unsafe during the night - doors from backyard to garage and to the kitchen are like a paper and also the lock was like nothing. Maybe in US it is normal but for me not OK.
But I have to recommend this place to stay as it is much more better (safer, nicer) option then to stay in SF downtown full of homeless people.