Giancarlo welcomed us on the street of the 500-year-old building where the flat was in. The flat was nicely decorated and was conveniently located within walking distance of all major attractions. The restaurants that he recommended were fantastic. We were spoiled by excellent Italian food in those restaurants.
The only issue was that, we were only told upon arrival that the wifi of the flat was out of order and had to be fixed. While it is not ideal that it is not functioning, it is understandable. However, this could have been communicated before we arrived as we actually stopped by the tourist information centre near the train station before arriving at the flat and was considering whether to hire a portable wifi device. We decided not to because we thought we wouldn't need that. Had he told us beforehand, we would have hired it and solved the problem (as some of us needed to use the internet).
Other than this, it was an excellent flat. If you are staying at his place, make sure you ask him where to dine!