Would highly recommend The Apartment Upstairs and Laura to anyone.
My wife and I had a short stay after a red-eye from New York and we were so happy with our experience.
The apartment is a very convenient to get to from MXP and just a 10-15 minute walk from the train station or a 5 minute walk from the subway.
The apartment was spotless and had a great little balcony where we hung out for a while.
All amenities you would need are included - including great shower water pressure and heat.
Laura was extremely communicative and accommodating.
We couldn't be happier and we will visit again.