My stay was absolutely perfect. The structure of Constantino's bnb is simple and good. I got an own room, an own bathroom and keys for his house. He offered a breakfast, that tasted wery well. He gave me an advice for a tour to the vulcan Etna. I have been picket up right infront of his house door and the tour was leaded by a very well english speaking Italian man. I've been guided by 5 other guys in my age. You should absolutely bring your oldest clothes you have ;-)
I highly recommend to stay at his house during a stay at Catania.
Thank you, Constantino! It won't be my last time of visit.