Maurizio' s place is very centrally located. It was my first time to Milan, so I did not realize this till after 2 days. The place is located right across chinatown, three blocks from Cimitero Munumentale (a must see) that is a must see for it architecture and artistic wealth, Arco della Pace, Acquarium, Castello Sforzeco, train station, Duomo.
The place is very secure, there are 5 doors one must enter before getting into the room, all with locks that open with keys and codes. I was a little cumbersome to manage, but understand what it has to be this way for an AirBnB place and not for safety reasons in my view.
We did not meet Muarizio, all of our communication before, during, and after was through Whatsapp, so you must ensure that you have internet connection before getting there. I purchased a local sim card. I wished I had known more about the location ahead of time and it would have been so much easier the first few days, so use google maps ahead of time to plot the points of interest, its all closer than it you think.