Paolo's place is exceptionally located in the center of Florence near Piazza Sant'Ambrogio. It's close to all the main city attractions in a neighborhood that is just slightly off the beaten trail for tourists which gives you the chance to mix a bit with locals. There is a market nearby (similar to the one in San Lorenzo, but smaller and less tourist-oriented), some wonderful and famous restaurants (like Cibreo and Pizzaiuolo). It's only a few minutes walk to the Duomo and Accademia del'Arte.
The apartment has a classic Italian feel and Paolo went out of his way to make sure we had everything we needed. There was even milk for our 14 month old baby in the fridge when we arrived. He is a very kind and helpful host. Our only note is that the second bedroom is partitioned with a curtain, which for us was tricky with a baby, but the apartment is very spacious so we made it work. You won't find a kinder host, or better apartment/location at this rate in Florence!