For the price, Santo's place is very good--it is a spacious apartment, and it is extremely close to the historic center of Catania. We were able to spend a nice day walking around town and see all the key historic sites, and Santo provided helpful tips about places to go and how to leave for the airport by bus. There are just two drawbacks to this apartment I would flag:
1) The apartment, while close to downtown, is also adjacent to a very sketchy neighborhood. If you are arriving by train, I would advise you to come during the day, as I would have been concerned walking through that neighborhood at night.
2) We saw several roaches in the apartment. Santo did help us kill one right when we arrived.