Mark and Sarah's place was perfect for me and they are the best host. I came to SF for attending the event held at union square, so I could have chosen other place in down town for convenience, but my decision to stay their place was totally right choice. I liked quiet, natural and privacy keeping rather than urban and stimulating atmosphere, still it's very close to the down town (just 10-15 min. by car). Loved private/small business such as grocery stores, cafes, pâtisserie and restaurants nearby (all these are recommended by hosts as well). Highly recommend this place to those who have similar preference like me. The host, Mark and Sarah are so kind and helpful with flexibility and smooth communication.