We had a wonderful stay at Federica's and Giuliano's apartment!
The place is beautiful, and actually more spacious then appears in the photos. The location cannot be beat - right in the middle of Campo dei Fiori - yet the apartment is well insulated and we were pleasantly surprised that we had no noise from the market or restaurants.
Federica and Giuliano were very responsive, and flexible with check in and check out times which we greatly appreciated.