We met with his friend, and she made us feel very welcome. Due to all the construction in the area, it was very difficult to get to the apartment, as the adjoining street is closed. Also, it was difficult to get around town, as SBB doesn't publish, other than online, bus, train, and tram schedules, maps and stops. WE didn't have WIFI other than in the apartment, so it made travel within Zurich quite difficult.
The apartment was lovely. All was comfortable there, and we were very grateful for the air conditioner, as the weather was unusually hot - 90 F. After the stair climb (5th floor), it was welcoming to have cooler air in the apartment.