We had a great time in San Francisco, which was also thanks to the room we rented. We only met Irina once and briefly (it was a brief yet pleasant encounter), but received a warm welcome by Greg, who manages the rooms. Greg is a very quiet, friendly and helpful host who treated us with all the hospitality we could have hoped for. He helped whenever he could and gave us tips along the way.
Despite the apartment being relatively old, it was still in very good shape. You will have everything you need there, including a spacious room. In terms of location, we were also very lucky. Market Street is about a 20 minute walk, Coit Tower is a 5 minute walk, the heart of Chinatown not even 5 minutes, Fisherman's Wharf can be reached within a 10 - 15 minute walk, and the actual location of the place, North Beach, has a plethora of restaurants and bars to choose from.

So all in all: We had a great time and if we ever come back to San Francisco again, we will aim to book a room in this apartment a second time.