Our week-long stay at Caterina and Michele's place was wonderful. They were communicative from the very start and gave clear instructions on how to get to the apartment in different ways.
The apartment itself was wonderful. It was spacious, clean and very airy. It gets very hot in Florence and they provided a room fan since there is no A/C. They also provided a complimentary bottle of red wine and champagne which was a nice touch and pleasant surprise. We cooked in the kitchen a couple of times and again no complaints, very ideal setting.
Based on its location, it could get very noisy at night as the place is adjacent to a piazza full of tourists but if you're walking around all day you'll be so tired you'll likely pass out regardless.
I would definitely recommend this place and would 110% stay here again!