What a hidden gem and a wonderful place to stay!
Pros:
Location, location, location! This building is adjacent to the Milan Cadorna station, specifically the platform for trains to/from Malpensa Airport. So this is the most convenient place to stay for airport transfers. In addition, none of the sights of Milan are more than 10 minutes by metro, tram, or walking. Plus, it is in a charming and lovely residential neighborhood, with several restaurants, bars, and bakeries nearby.
Apartment-style living - You have a small kitchen area with fridge and stovetop, as well as a table with chairs. My room also had a sofa. It was convenient to have a place to sit and use my computer as I was making plans for each day in Milan. The unit is cleaned after your stay, so you don't have to worry about housekeeping coming in everyday. Also, instead of getting a key at the front desk, you are given a code to enter your room (one less item to keep track of!)
Cleanliness - the whole property is spotless. There is also a laundry room with washer/dryer (pay to use), and irons/ironing boards/drying racks (free to use) and a small gym.
Cons:
Mattresses are not very comfortable.
Thin walls - you will hear the noise from other rooms (and for some reason, people make a lot of noise even in the overnight hours)! If you are a heavy sleeper this shouldn't be a problem.
Overall, you can't beat it unless you expect the amenities of the Four Seasons.