Valerio is a great host -- very responsive to any question and he provided a great deal of useful suggestions on restaurants, shopping, sights.
The apartment is spacious and contains with beautiful artwork and furniture. Photos do not do justice to the apartment. The bed was very comfortable. The building is quiet and located at a bus station which is useful for getting about (the apartment is within walking distance of some major sites, but if you want to conserve energy, making use of the bus and metro system is a good idea).