We had a terrific stay in Valerie's sfbspot. The house is really perfect: large rooms, very comfortable beds, quiet bedrooms, everything very clean and tidy and all required amenities available (although we didn't really make too much use of the fully equipped kitchen). The communication with the host was great and Valerie is very attentive with an eye for small details.
Check-in and check-out were extremely unproblematic, e.g., allowing for quite an early check-in. The house is located a 3-5 min walk to Balboa BART station, so in about 20 minutes you can be in the center of San Francisco. All in all I can very highly recommend this place - next time I'm in San Francisco I would definitely like to stay again !