I can only recommend Johnny's place. To start with location- top location meters away from the Duomo and, which is even better,from a bus stop at Piazza Paolo Borselino /just behind the duomo/ where you can get on an Interbus to Siracusa/Ortigia/ and Noto. It is 25-30 mins away on foot from Cental station and Central bus station. You can get a bus or train to Taormina. In other words excellent home base for exploring the eastern part of Sicily with public transit. You also take the bus to airport from that same puazza /20 mins/. the apartment is clean, well furnished /excellently equipped kitchen/ and spacious. We loved it. Johnny is an amazing host. He will check on us, respond immediately whereas a question arises and let us leave the apartment way pas check out time. You will love both the accommodation and the host. Once back to Catania I am booking there again.