We stayed for 4 nights in the apartment at the end of March. Here's our experience.
The good:
1. The apartment is in a walking distance from all the sites you would like to visit as a tourist (for example, it's a 6 minutes walk to Piazza Duomo).
2. The apartment has good connections with Catania airport. Alibus station close by. 15 minutes walk to the railway station and Interbus station.
3. The kitchen of the apartment has basic equipment to cook a breakfast. Beds are comfortable.
4. Host is really nice, they allowed us to leave the luggage before the check in time.
What to improve:
1. The apartment is in the old center of the town. There are a lot of pubs and bars in the area, one is just under the apartment. The music and the people on the street can get pretty loud sometimes (it looks like it's ok to party till 2-3 AM in Catania). Other nights it was quiet. This is not the best option if you're travelling with a family. It you're travelling to party, then yes.
2. The apartment has no heating system (it has a machine that blows warm air). The apartment is in an old building. Most buildings in Italy do not even have heating systems. If you're travelling in the cold season (November - March) this could be an issue. No problems in the hot season as the location must be nice and cold when it's hot in the summer.
3. Some furniture is old and smells bad (wardrobe in one of the bedrooms).