I have stayed at Guido's apartment two times already. The first time for two and a half months and the second for just a couple of days. The apartment is very central, located in one of the most beautiful areas of Florence. You can easily walk around the city without using any form of public transportation. Around the areas you can also easily find a lot of bars, cafes and restaurants. Also make sure to visit museum Bargello, which you can clearly see right after you step outside of the door, because it is one of the best and maybe less known museums in Florence!
The apartment itself id beautiful, very clean and equipped with anything you need. Guido is also a great host, who always assisted with anything I needed!