What is there to say, but...you MUST book this flat! It is located about a 5 minute walk from the Duomo, about a 10 minute walk from the train station, and well within walking distance to most sights in Florence.
Paolo himself is a gracious and attentive host. The first night we arrived (Christmas Eve), he walked us to the nearest grocery so we could buy food for the next couple of days.
The flat may be smallish, but it has a very comfortable bed (the best out of our trip to Barcelona, Florence, and Rome), and the kitchen is well stocked with cookware.
We are forever grateful to Paolo for making our second leg of our honeymoon one for the record books.