Positive: The flat has a really good location. It is in a very quiet neighbourhood, where I felt safe going home even at night. The metro line A is approx 8 mins by foot, and with that you can easily reach the center. The flat has a beautiful terrace, and my room (Kristal's room) was quite separeted inside of the house so it was perfectly quiet and I felt I have my own privacy. There is a very big wardrobe so it is perfect for longer stays. Giorgo always responded me very quickly whenever I needed help in something. Wifi worked perfectly, and we never ran out of hot water, even though there were 4 of us in the house.
Negative: I found two bugs in the room, it was probably wood-lice. In the kitchen and bathrooms there is very little natural light, and it would be useful to have a cleaning lady for the kitchen because when 4 strangers use it, and probably most people are here for tourism they won't spend their time on cleaning and because of that it gets dirty.
All in all I had a good time at Giorgio's apartment and would recommend to stay here!