Wow! Lina is nothing short of amazing. Long story short, I would have been homeless in San Francisco without her kindness. She treated me like family and made sure I had somewhere to stay for the duration of my summer in San Francisco. Her home was warm and welcoming, and CLEAN. Lina stopped by everyday to clean the home herself. Easy check in and check out process.
There's a nice farmer's market open from May-October within walking distance that I checked out on a Saturday morning. BART, groceries, the post office and a shopping mall are all within walking distance as well.
Note: The airport is right nearby so bring earplugs if you're a light sleeper. It didn't bother me at all, but for some it might.