Kurt's place is very well located with off the beaten track places like Cortland street, Valencia Street, the very nice Noe Valley, and even the Castro just a few blocks away (great neighbourhoods for breakfast places, nice shops, bookstore, cafes and bars). We had great walks all the way to Haight-Ashbury, the De Young, Cliff House and Presidio, starting from Marina street, but if you'd rather save your energy for other activities, the 49 line, plus one transfer if needed, will take you pretty much anywhere in that gem of a city.
Kurt was a wonderful host. His help and advice were greatly appreciated and his home is a charming, warm, comfortable and quiet place that I am very happy to recommend to anyone willing to experience San Francisco in an immersed, enjoyable, authentic way.