We stayed with three kids for 3 nights and had a great time. I would recommend the apartment which is really nicely decorated and indeed elegant and spacious.
The location was absolutely perfect to walk to all major attractions. The restaurants downstairs were great and the atmosphere at Piazza Copelle really nice and not too touristic.
Unfortunately the bathrooms were not properly cleaned when we arrived. However nothing that would have impacted our stay.
Francesca was very kind, quick to respond and we could check-in early and leave our bags after check-out.