We spent two nights in Alessia's appartment and were very satisfied. It is situated in a classy old building in the center of Catania. The flat itself has been recently renovated and is very modern and bright. The kitchen is well-equipped so that you can cook something when you don't feel like going out. If you do want to go out, however, the city's most interesting spots are well in walking distance.
Alessia was very friendly and helpful. She gave us recommendations as to what we could see in the city and even arranged the transport to the airport for us.
We can definitely recommend this place.