Myself and two of my close friends really enjoyed staying in Hal's teeny house! It is definitely accurate to say it is tiny but it is also has all of the basic amenities that you need while traveling. We also loved the location: on a little hill in the Fremont neighborhood, with plenty of trees and roses in bloom (and we got to see some beautiful hummingbirds one evening, from the green roof/patio). Fremont itself has many good restaurants, bike paths, a food co-op, chocolate factory, etc.
Hal was very friendly and gave us lots of tips of where to eat and what to do in the neighborhood. He was easy to get in touch with when we were checking in and he thoughtfully had left us some snacks in the guesthouse for us to have when we arrived (which we much appreciated after our travels!). Would definitely recommend it to others who are willing to try out a small/unique travel experience!