I stayed at Santo's apartment in Catania for a few nights, and I had a fantastic experience! The studio is well-equipped and has a great balcony with a wonderful view of the city, and is within close distance to many of the main sights and attractions in Catania.
Beyond the apartment, though, I really recommend a stay with Santo! He is incredibly attentive and accommodating: he set up an early check-in and early check-out with me (and even called a taxi to take me to the airport on my departure), he was always readily accessible via WhatsApp and responded very promptly to my messages, and he gave some fantastic recommendations for local restaurants and attractions.
Most commendable of all is Santo's willingness to go above and beyond to make his guests feel safe and comfortable. On my first day in Catania, I went swimming in the ocean and ended up with some sea urchin spines stuck in my fingers. The problem wasn't urgent, but I did want to get them removed. I messaged Santo and he immediately responded with an offer to take me to a clinic (we ended up going twice!), and the pharmacy. Santo conversed with the pharmacist and doctors on my behalf, since I don't speak Italian, and he took time out of his day to ensure that I was well-cared for. He also checked in on me the next day! These instances of kindness and thoughtfulness made me feel much better about this minor medical issue, and speak to Santo's high regard for his guests!
I would heartily recommend a stay in Santo's apartment -- both as a great base for exploring the beautiful city of Catania, but also for Santo's thoughtfulness and generous spirit.