Christina's place was lovely. 5 friends and I (two couples and two singles) stayed there.
We liked that it was only a 15 minute walk to downtown San Mateo and a 30-35 minute drive to San Francisco.
We also liked that the fast internet, the abundance of hot water, and little things like a portable Bluetooth speaker that was made available to us.
There was only one drawback: the house is near a busy railroad, so if you're sensitive to noise it may bother you. That being said, it was never an issue for us.
Would highly recommend for friend groups with couples or extended families.