All I can do is confirm what many other reviewers have already written. The apartment is in a nice central location that makes walking to the major sites very reasonable - it's not super close to anything, but close enough to everything. The entrance is on a narrow and relatively quiet street - no real issues with noise. Massimo and his colleague were more than helpful with arrival and departure, and were kind enough to arrange for a van for my family of 5 to get us to and from the airport. The apartment was clean and accurately described. One small advisory - while each of the two bedrooms and the living room with the sofa bed have AC, we were advised not to use all three units at the same time as it would likely overload the main breaker. Such limitations are hardly a surprise in an older building, but on a hot summer evening, if all three sleeping locations are being used you'll have to draw straws for the AC.
A great apartment and value overall.