We were pleased with our stay with Valeria. The apartment was very clean and hosted 3 people just fine. There was a metro station within a 5 minute walk from the apartment. This was super convenient whether you are traveling to Milan by train or by airplane (a bus takes you to the main train station from the airport) because you can take a cheap metro versus paying for a pricey taxi! The Duomo is a 10 minute walk from the apartment and there are tons of stores on your way to the Duomo plaza area. You will definitely be busy!
We did experience a leaking issue from the skylight. We had a storm overnight and puddles of water were found the next morning. I contacted the host/main point person immediately in the morning, however, did not hear back until early evening. We were not in the apartment all day, and thankfully, it stopped storming out, but a quicker response time with an issue like this would have been better (we did not have extra towels to clean up the water, but those were then brought in the later evening).
Also, it is worthy to note that the apartment is up four flights of stairs-no elevator! Keep this in mind if you have a lot of luggage!