centrally located. close to amenities including grocery stores and subway. host was immediately available. per other comments, the street sound can be loud however that's what you get with proximity to major sites in a large city.
I recommend that you don't go to the Gran Caffe. Sweet & Savoury around the corner on Via Angelo Poliziano. The woman there takes advantage of tourist by charging an exuberant amount. aside from this tourist trap experience, our trip was very memorable.