First off: Cecilia is a terrific host, and deserves her superhost status. She was responsive and never intrusive.
Second: My sister and I stayed in Unit A of a house that has, I think, three apartments. It is an older (I assume) house in a very good location that has been subdivided into apartments and thoroughly, attractively modernized. I admire the ingenuity of the way tings were arranged, and everything was as pretty in reality as in the pictures. It was a pleasure to stay there.
As other guests have observed, there is some freeway noise, for the house is very close to a major freeway. It is louder in one bedroom than in the other. Cecilia has thoughtfully provided earplugs, though I didn't need them; my sister, who stayed in the room closer to the freeway noise, used a white noise app (or maybe an actual fan that had been provided? I'm not sure), and said it was fine.
Because of the freeway, one of the cross streets very close by is probably not a place one should walk in at night. But the neighborhood itself felt safe to us, two women over 60, who walked into the SOFA area just a few blocks away, and back after dark, without incident. If you've never spent time in downtown San Jose, you should know that it has its share of homeless people, some of them clearly drug-addled; and that there is a lot of motorcycle and low-rider noise on the streets pretty much at all hours. If this is a problem for you, I would encourage you to stay further from downtown. But for walkability and access to public transit, the place is great; and I admire the tasteful and thoughtful way Cecilia has appointed the unit in which we stayed. She seems to have thought of everything.