The apartment was perfectly located with many nice restaurants within a walking distance and a couple minutes away from the Vatican and a metro station so you could get to all the sights very conveniently.
Alonso was a wonderful host and welcomed us by showing the apartment and had also left a map with information about the area (e.g. restaurants and grocery stores).
The apartment itself was very clean and even more spacious than the pictures show. The shower was modern and spacious, and the electric sockets were such that they supported both the Italian and other European plugs.
Thank you Alonso, we'll be back the next time we're in Rome!