The apartment is perfectly located just a few minutes walk from the Duomo. There are a lot of restaurants and stores within a couple of minutes from the apartment. There a few flights of stairs to the apartment but really not a big deal.
Mario was awesome and let me drop off my luggage in the apartment prior to check in so I could enjoy the city and also help me save money by telling me how to go from the airport to the apartment by train instead of taking a cab/Uber.