We would like to thank Philippe for his fast replies and flexibility! The apartment was as on the photographs, clean and very modern. The place is away from the street side, but unfortunately, the walls were quite thin and the neighbors weren't quiet... None the less, the location is just amazing, 3 minutes from the main street and in the heart of the old town of Geneva. On the downside of that, if you have a car, you will face many troubles with parking and the fact that the old town is closed from 9 a.m. until the evening and won't be accessible by car unless you have a pass to enter.
Other than that, we have really enjoyed our stay and would recommend it to anyone.