I stayed 3 nights at Cecilia's place and everything was great. Cecilia was very flexible with my check in and check out times. She and her family were extremely nice and helpful. The room was cozy and clean. I have nothing to complain about.
For the travelers who don't have a car, the location of Cecilia's house is perfect. It's maybe a 15 minute walk to downtown San Mateo. From downtown you can catch a bus to Bart or a train to San Francisco/San Jose and be in the city in no time.
I would definitely recommend this place!