Great stay in florence with great hosts. I will note that the apt is located next to the CMD train station which is not the main train station for Florence. However, it is very easy and cheap (1,50 euro each way) to get back and forth and only a 5 minute ride. I have no issues sleeping at night, but for a light sleeper it could be difficult as you will hear the train in the early morning. Other than that it is easy to take the train to main station and then walk around downtown and explore the sites.