Nicoletta's place is super nice. My only tip for travelers coming to Italy in off season: be prepared that there is no heating in most of the places, especially in center locations with historic buildings.
Nicoletta's place is nicely decorated, really clean, ad has pretty much everything you need: kitchen supplies to cook, coffee, towels, bathroom cosmetics. The location of the flat is also amazing, 15 min of slow walk to Spanish steps, 20- 25 min to termini station, no need to use public transport at all. Karyna who met us for check in is a lovely girl. Overall, thanks a lot!