Sarah and Mark (and Clover's) place was an excellent 2.5-week stay as I finished up work at UCSF; it is a 20-minute walk to and from Mission Bay. The apartment was sparkling clean with a comfortable shared living room (great view as advertised!), and my private bedroom and bathroom were restful. The kitchen was well-stocked for cooking and eating. Sarah was also super responsive with providing a spare key when I locked myself out of the space!
The apartment is walking distance from essential shopping spots as well as some excellent dining options (all currently providing takeout!) There is a great grocer a two-minute walk away as well as a laundromat right around the corner. As a one-year SF native, I can confirm that Sarah and Mark's recommendations for nearby restaurants (posted on the bulletin board on the kitchen) are excellent; some of my favorites were present, and through them I also discovered the fantastic lemon ricotta pancakes at Plow (a nearby brunch spot).
I would highly recommend the space for both short-term and long-term stays. Thanks Sarah and Mark for your hospitality!