The host gave us us a warm welcome even when I arrived an hour late due to a train service problem. He explained me everything about the flat. It was very clean, tidy and bright. It also included some groceries and toiletries.
Location is great. The place is next to San Babila station and very close to the Duomo (8' walk). Walking to the train station is also possible (25' walk).
The hosts let me know in advance I could stay an extra hour due to a delay of the next guest :-) Also, they have a small security box in the door so it is very easy to leave the key there when checking out.