We highly recommend this place. We are a family of five (three boys, 17, 15, 9) and there was plenty of space for us to spent a few days. The kitchen provides everything you need to store the food (or keep it cool) and prepare the meals. The living room has a large table and enough chairs to properly have the meals together. Further the couches are cozy and the entertainment system provides all you need for a late evening in front of the TV.
The beds are very comfortable and (this is rare) the blankets are very good - the nights were already getting chilly but the blankets are warm and soft.
With two bathrooms there wasn't any trouble about who can use it the first. Both are very well equipped and very clean. The garage had enough space for our 7-seater rental SUV and the direct access to the flat is a plus.
The location is perfect for trips to different places in the Bay Area. Downtown San Francisco is less than 30 minutes and most other places are within less than 50 minutes.
The communication with the owners was very friendly and easy.