Linda's place turned out to be exactly as advertised - a large, private town home in a central location. We enjoyed our stay immensely!
The walk to the BART station was manageable, and we were able to avoid a hefty car rental bill by using public transit for the whole time of our stay. The local transit authority offers multi-day passes, which are a great value. However, if you are not familiar with the SF transit system, be sure you get the right pass. The BART (subway) system operates independently from the buses and trolleys (The "MUNI"). The standard multi-day pass for the MUNI does not include access to the BART system. (We purchased MUNI passes from the Walgreen's at 23rd and Mission.)
One other comment: be sure that you have Linda's information packet before arriving. I missed the email Linda sent with directions for unlocking the key box, so we had to make few calls to get the information we needed. Thanks to Linda and AirBnB support, the mix-up didn't cause too much difficulty, but you can avoid all of this by making sure you have all the information beforehand.
I would recommend Linda's place to anyone who is looking for a great place a great price. SF isn't a great city for renting a car anyway, so if you are prepared to walk a little bit, and don't mind taking transit to get to the waterfront and/or tourist destinations, I'm sure you will enjoy your stay at Linda's place.