We stayed in Alberto's apartment for a couple of days with my family for my birthday and we have been very happy with this accommodation.
Communication with the host was very easy: he responded quickly to our messages and he was always available during the stay, check-in and check-out process and also when we asked for information about the city and the restaurants.
The apartment is very central, modern and is located in a nice and quiet area. It's also well connected by public transport and there are many supermarkets close to the building.
We really enjoyed our stay in Geneva and I hardly recommend this place!