I stayed at this apartment for a week with my girlfriend and her niece, and it was all we could've hoped for. The apartment was very cozy, clean and with lots of room. The apartment is located very near to the metro line and train station, which makes it very easy and quick to move around the city and the surrounding areas. There's also a big market held on tuesdays and saturdays just a block away, which is definitely worth checking out.
Mattia was a gracious host. He's a very friendly and helpful man and gave us good tips for our vacation.
If you're heading to Milan, this is a great place to stay.