Very good location, 5min walk from metro Sondrio, 15 min walk from Milano centrale train station, 15 min by escooter to Duomo or 20 min by metro. E-scooters Cooltra is also available in the area. Host is very nice and helpful, replies fast. Apartment and bathroom is old but very clean and neat, has all the basics. Bathroom is shared and only one, very clean though.
Recommend taking sleeping mask if you are sensitive to light, and earplugs. Smoking is in the kitchen or balcony but well ventilated.
Walking distance from the main train station allows to take 1-day trips to Como or Venice, for example.