Eugenia's place is centrally located - walking distance to everything in the central core of Florence. She is a great host as well; we arrived on a holiday and she had her friend check us in, she provided us with detailed directions.
The place is comfy but was too small for our family of five. The loft bed is cute but we found it to be a little dusty and chose not to use it. The bathroom is also very small but admittedly that is not too uncommon in Italy.