This is not our first time in Milan.
Pros:
Giacinto is very responsive person. We've got our plans messed due to Air France strike and Giacinto helped us a lot! Thank you, Giacinto.
Check in and check out were smooth.
Parking place was perfect, we had a large SUV and there was not a problem at all. Parking is with electric gate, few steps from the entrance.
Elevator in the building (although take in the account that there are stairs to get to the entrance. Those with heavy luggage should be advised).
Neighborhood is safe and there are plenty of shops around.
Metro station is near and will connect you with the center in half an hour.

Cons:
The apartment itself is a bit outdated with specific smell of oldness. Posterior wall of the wardrobe is broken. (You can still place your clothes though).
Make sure to bring with you soap for bathroom. We checked in late in the evening and it wasn't possible to buy one.
Very small fridge. Small kitchenette.
It is very hot inside the apartment! and you cannot make the air move even with the opened windows because they are all on the same side. Also you cannot open the windows without shields in the evening because of the proximity of the neighbors' windows. You should use ventilators even in the end of September and beginning of October.
We constantly had problems with wi fi internet connection. It was impossible to connect two devices simultaneously to the internet most of the time. There was some restriction. Giacinto has another apartment for rent and internet was divided among the guests. For me internet was very important and I always asked my wife to disconnect in order to let me to connect. Giacinto was responsive but not helpful in this issue.
Furniture is very uncomfortable and it is difficult to seat on sofa for more than 30 min and the same are chairs.
Problem with drainage in the bathroom.
Ask Giacinto to provide you with two pairs of keys. Because it is impossible to get to the apartment (the place has gates from both sides and entrance door).
We've been in the apartment only for few late evening and early morning hours. Most of the time we were out. I think it is even more important during those few hours to feel like you are home. Unfortunately we hadn't that feeling this time.