My friend and I were welcomed by Nikolas' mother, who is gracious and helpful.
The apartment is just as described in text and photos. It is nicely decorated, has all of the amenities listed, is clean as a whistle, and conveniently situated. Nikolas' description of how to find the doorway was spot on. He was also helpful and flexible concerning our arrival time which was earlier than previously agreed upon.
The apartment is smaller than it appears in the photos but is efficiently laid out and nicely decorated.
The views from Russian Hill are breathtaking! And, most areas of interest (e.g. the Embarcadero, trolley stop) are within walking distance, should you not have a car. But be prepared for a good cardio workout upon return.