The apartment is quiet (opening into a courtyard full of greenery) and very conveniently located.
It is close to the United Nations (a 25 min. walk), the lake and the parks, as well as the downtown attractions.
The bus/tram stops are nearby, and so is Cornavin (the central train station) which has the only supermarket in Geneva I know of that is open on Sundays (Migros Cornavin).
All in all, an excellent experience. Thank you, Lionel.