Federico is a nice guy, very friendly and polite. He rents multiple rooms in different buildings as he describes himself, unfortunately the rooms vary in quality so I would advise picking the room you would want in advance from the 30 pictures shown on his listing page and letting Federico know to avoid any surprises.
We have not seen this on airbnb before so we booked thinking we were going to stay in the first room featured on the listing, but we were informed over a month and a half after booking (one week before arrival) that we would be staying in the smallest room at the end of the long list of pictures. If you book a room here, be aware that you are booking a possibility to stay in any of the rooms available, not one specific room. We were disappointed by this because we ended up in a small room inside an apartment, and it varied greatly in quality as compared to the first few rooms featured on the listing. Other than that the location is great and Federico was very nice.