My stay was perfect in Susanna's home : the appartment is very comfortable and quiet, and close to the Duomo (10 min. by walk) and to Fiesole (20 min by bus). The bedroom is large, kitchen and bathroom are clean, and the decoration is soooo elegant! Don't worry about the district, tihs is a quiet area.
And Susanna is THE host you need : she's very kind, friendly and professionnal! She picked me up and brought me back to tha airport, as her time table enables her to do it. She pays attention to her guests and gives very good advice for your journey in Florence. Very nice memories. You will enjoy your journey in this marvelous city if you stay at Susanna's !