Valentina's place is in a great location! Ten minutes on foot from the central station, five minutes to Repubblica (so 15 minutes to Duomo), seven or eight minutes to Porta Venezia and surrounded by (very reasonably priced) bars and restaurants.
Communication before the visit was very quick and friendly. Valentina was happy to answer extras I had about the place. She wasn't there for check-in but her cleaning lady waited for me instead and explained everything I needed to know about the flat. Very smooth.
THe flat itself is great. The room is at the opposite end of the flat from Valentina's room and the bathroom so it's quite private. The small balcony is a nice extra feature, too.
Plenty of space, everything is clean and in an awesome location. I would definitely go back again!