Beautiful place, amazing host couple, and terrific location. The one thing that I'd say could be improved here is that the pictures don't really do it justice. The back yard that the little unit opens up into is incredibly nice, with shade, fruit trees, comfy couches and it's just a great place to relax.
Stayed here twice now, once by myself for work and once with my family (including a 1.5 year old toddler). Just an amazing experience both times.
Also super convenient to downtown SF.