First of all, the location of the apartment was the best! The tramway is in front of the building, the subway is super close (3 mins) and there is also a supermarket at 2 mins away. The apartment was super clean and nothing was missing.
Katia was friendly and comunicative. What I liked the most was the fact that she was so well organised. She had a big book ("The Bible" :))) where she put all the info that you need - how to use the electric devices from the apartment, what you should do/visit in Milan, the best restaurants in the neighbourhood and so on.
Honestly, I don't think that you could find a drowback to this apartment. I strongly recommend it.