We liked the apartment very much, it has a central position close to the station and central market, maybe 500 m away from the Florence Dome (on foot) but it was still very quiet, we did not really feel the agitation in the streets, which was great.
The house is new, has an elevator and an underground parking, which we really loved as it kept our car cool (we visited in July, with temperatures booming 34 degrees). The flat has air conditioning in every room, is very modernly furnished, the kitchen is great and fully equipped (it even has brandy glasses and a Nespresso machine plus some capsules, much to my husband's delight). The bed is really comfy and the Wi-Fi is fast. There is as well a balcony but it was too hot for us to stay outside, so we did not use it at all.
We did not get to meet Chiara as she was on holiday but had Letizia as contact, which took care of us and was very kind and patient to answer to all our questions. We found the organisation very good, the instructions on how to arrive were very concise, the recommendations in terms of places to eat great (we really enjoyed eating in the central market, the food there is delicious and there is so much choice we had difficulties deciding what to get :))
Overall, we had a very pleasant stay, would definitely stay there again next time we are in Florence.