Elisabetta's cute penthouse was one of the highlights of my trip to Milan. Elisabetta is a great host who is helpful, friendly and gave clear instructions for check-in. She gave detailed heater times and why they are only on for certain hours, and even printed out a map to show us how to walk around! Her guidebook on Airbnb also helped us narrow down things to do in Milan as we had very limited time.
However, be aware, her penthouse is located on the rooftop that is not accessible by lift. You will have to take narrow stairs to go up to the rooftop. If you have a huge luggage as I did, good luck! hehe!
All jokes aside, it's a 20-min walk to the Duomo, there is also a tram nearby and the metro is also walkable! But listen to Elisabetta, don't take the tram, do walk. You won't regret it! During my stay, there was also a morning market just behind the building. You can also find restaurants and pharmacies nearby.
Overall, Elisabetta's place was perfect for us!