Leo's place was clean and comfortable and right near the heart of the city, but somehow was incredibly quite during the day and at night. It's within walking distance to nearly everything and he gave us excellent recommendations for nearby places to eat. We would gladly stay here again on our next trip to Florence.
A note for any other American travelers: the apartment is on the second floor, and while the stairs are in excellent condition, they are much more steep and narrow than we are accustomed to. Additionally, this is a European sized apartment and so the hot water heater is as well. It refills quickly between showers, but we didn't get much more than 10-15 minutes of really hot water at a time.