I just saw Yumis listing re-appear on PD, so this is a PSA.
I saw her years ago at her Marin location - private residence up the hill a bit on a residential street. She looked nothing like pics, she was also older, and the whole vibe of the place was run down and strange, so I walked - first time ever, though I gave her something for her time just because I'm soft that way. As per the above messages, i suggest avoid. I've got no idea how she generates the stellar reviews for so many years, so someone must be happy though.