We stayed at Federica's studio for 7 nights. It was fall and the weather was nice so we couls keep the window open day and night to have fresh air. The studio is perfectly located as it is only 5 min walk from Piazza della Signoria and Uffici. Besides there are a lot of nice places to eat or buy things for breakfast or things like shampoo/soap etc.
The studio is rather small (if you are a big persson you will have problems with using the shower:) And be sure to check if the wi-fi is working properly before you stay alone (we managed to sort it out at the 2d night only).
Federica was absent so her friend Marco let us in and was really very helpful during our stay! It was very comfortable that he came in to leave our Euro 100 deposit without us and we could just put the keys on the table and leave when we needed.
Elena, Russia