I stayed by myself at Margo's and felt completely secure. The apartment is in a fantastic location for exploring the local neighbourhoods(highly recommend doing this) with a bus route 100m away direct to downtown San Francisco(not as great!). Checkin was really simple and I had the opportunity to meet Margo's family in the apartment above who were all incredibly welcoming. Margo is super responsive to any queries. Great wifi. Perfect location for me as a triathlete - only two blocks and a scenic gently undulating run through the long Golden Gate park all the way to the sea and then kilometers of promenade. A fifteen minute walk to a super swimming pool at the San Francisco University Koret leisure centre(sadly :) I qualified for the senior 15 uses over a year pass $53). Super cafes and restaurants over in the Mission area. Wholefood supermarkets in most neighborhood high streets but poached eggs and avocado and coffee easy to find. Recommend the other side of the Golden Gate Bridge for either Hawk Hill biking or drive up and walk some rugged coastline. Although it rained a lot, and although my son, who is living in San Francisco, showed me all the cool eateries, I found it easy to explore on my own. It's a super Uber service - but, if you want to get fit, look no further than just walking the near vertical ups and downs of the local roads(nice because cars go slow to stop every small block for the pedestrian crossings) !