Very central location, very nice street but can be busy. Tour groups regularly pass through or stop right in front of the building, but fortunately not at night. Unfortunately, I think we visited during spring break because you would hear massive groups of students shouting/chanting/singing in the Piazza, and then some would spill over to our street through the alley. This would happen at night.
Large bathroom with tub and washing machine, very clean.
Flat is a bit dark, but we were there during a rainy time. Could have used a reading lamp near the couch.
Federico is a very good host. At first we thought the flat was too cold and he changed the thermostat right away. We had no other issues. He is very personable and accommodating. This is a good flat for you if you need space. It has a nice table and chairs, and the couch is quite large. It is not a stylish flat, but it all works and is clean.