Caterina's apartment is in a great location with very easy access to the city's historic sites. The Palazzo Vecchio, Galileo Museum, and Uffizi Gallery are right around the corner (<2 min walk) and the you can reach pretty much any major site within a 15 minute walk. She was very nice in meeting us in front of her apartment (it's a little difficult to find at first but it's to the right of the pharmacy). We arrived by car and if you're doing the same I recommend either Parcheggio Beccaria (€1,70/hour, 15 min walk) or Parcheggio Piazza Alberti (€20/day, 30 min walk) for parking. Overall I would highly recommend this place for it's great location and relatively low cost.