I stayed at Luca's place for five nights with my wife, infant daughter and my mother and father in law. The flat was spotlessly clean and comfortably accommodated all of us (and Luca kindly arranged for a travel cot to be set up for my daughter). It is very centrally located and provided a great base from which to explore Florence. The Duomo is about a 5-7 minute walk to the North, and the Ponte Vecchio about the same distance to the South. There are loads of bars, restaurants and shops in the immediate vicinity. My personal favourite was I Fratellini, which is a tiny wine and panini shop just across the road from the apartment building. We would definitely stay here again next time we're in town!