I stayed here for 10 days whilst working in the Redwood Shores area. It was my first experience with airbnb and it was a totally postitive one.
The bedrooms in this house are all on the 1st floor, next to the common sitting room and dining area. The room I stayed in was comfortable. It's described as being 'snug' but for one person it was absolutely fine. There was a desk to use and plenty of space to store clothes. With the windows open there was some slight traffic noise as the room points towards 101 and the local main road, but this didn't affect me, and I'm sure there are a lot of places that would be a lot worse. The bathroom is fine and has everything you'd expect / need and was maintined in a perfect condition throughout. If all four rooms were in use the single bathroom and toilet may become a bit busy, but there's a system where you can 'reserve' a specific time on a white-board if you want which could help with coordination. It wasn't a problem when I stayed though.
The breakfast provision is good. You can help yourself to cereals, bread or fresh fruit and the home made granola was as good as other reviewers have commented. The ability to store food in the fridge was also good as I liked to buy a few things to make salads.
Bob was happy to answer any questions I had about local supermarkets etc. but the hosts are also very discrete and just leave you to do your own thing, which suited me well.
In summary I much preferred staying here than in a generic motel, and if / when visiting the area again would certainly look to stay here again if there was availability.