We had a very good stay at Enrico's flat. It indeed is on the 5th floor with no lift so expect heavy lifting if you are coming with big luggage. Location is fantastic, right next to Mercato Centrale (very good to have some quick lunch or snack) and very central. There is enough space for 3 people. It is not very modern nor new apartment, I'd say basic. If you want to live like a local that is the place. No view from the windows as they face the back of the building.
In winter it is very cold inside. During our stay it was about 2-3 Celcius and about -2 during the night and the flat was absolutely freezing. Didnt have a thermometer but no more than 15 Celcius I think. Bring some proper underwear and jumpers to sleep in. Shower was great though with hot water. No problem with the heating in the summer obviously.
It was well equipped apartment although we were really busy during our stay so we haven't used it much.
Recommended for affordable and central place during weekend trip.