The apartment is in a great part of town and is only 10-15 minute walk to most museums and sites. Actually you can walk everywhere without taking a taxi or public transport. We found two very good Tuscan restaurants within a few blocks that became our go to places to eat a good dinner.
The apartment is exactly how the pictures show and it has security doors but we never felt unsafe anywhere in Florence really. The area is lively at night and there is street noise. But that is one of my favorite things about traveling. I love sitting on the balcony watching people walk by at night. We had a washer and dryer which comes in very handy (and she shows you how to use them). You can cook if you want but as I said there are several great places near by to eat.
Giulia is pleasant, beautiful, and a great host. She responds within minutes of sending a message to her.
It is important to note that in Florence you cannot hale a taxi, you must go to a taxi stand and there is one just a block away from the apartment.