Location location location! This apartments location is unbelievable. Within a 10 minute walking radius of the apartment is the Duomo, Accademia, the train station, Uffizi gallery, santa croche, Arno river, and shopping areas. Basically every single thing you need to see in Florence is right near you, so this place is perfect for people who have a short stay in florence like we did.
Federico is super nice, and not in your way at all. You don't see him unless you need him. He gave us helpful recommendations for restaurants and places to see. His apartment is beautiful and anqitue, and he is very accommodating.
Two complaints -
1) the bed cover sheets in the room i stayed need to be changed. They are so old I honestly did not feel comfortable sleeping in them. I understand he might be going for the antique look like the rest of the rooms decorations but I'm okay with antique furniture, not antique sheet covers.
2) the windows don't exactly seal shut to close out the noise so every morning you are woken up bright and early from the noises of street vendors dragging their cart on cobblestone - and it is loud! To Federico's credit he left us ear plugs on the bedside table but I didn't realize I would need them till I was awoken the next morning.
Overall, the stay was great, Federico was accommodating, and his apartment is clean and very well located. I recommend staying here.