Sebastiano's property is just fantastic!
If you are going to stay in Catania you should definitely consider this. We stayed with another couple and we each had a separate apartment, with a large room and en-suite bathroom. There was a shared kitchen and two terraces, with the large roof terrace perfect for a nightcap. The property is in the heart of the old town so you can visit everything on foot and there are plenty of restaurants and bars close by.
Communication with Sebastiano was excellent before and during our stay and he was very quick to respond to queries and to offer recommendations. An excellent host!
We would not hesitate to stay again when we visit Catania in the future.