Off a fairly busy road this apartment was really well insulated from the street noise, though you can still get disturbed by your neighbours - cooking food, chattering, banging stuff up and down stairs - if you are sensitive to that sort of thing. Personally it didn't bother me, just added local colour.
The apartment itself is spotlessly clean, well furnished and has everything you might need. Pay attention to the warnings about the power use, we managed to trip the electricity by using an adapter plug which for some reason wasn't compatible with the system. Alessandro was really quick in responding and came to restore power within 30 mins, and we had no further issues during our 3 day stay.
The location is great, there are cafes and shops within 5 mins walk, as is the main sightseeing, pedestrianised zone.
The only niggle was the lack of privacy for whoever uses the smaller bedroom - maybe a curtain to draw across the opening into that room would be a nice touch?