We had a lovely time staying at Carmine's place. The apartment is very near the duomo area and the train station, plus it is right in front of the central market! It's true that it can get a little noisy in the morning but if you don't mind the noise (and sharing the place with other people), then the apartment's perfect and very convenient!
Carmine on the other hand is very accommodating and is always available online when you need him. He provided instructions on how to reach the apartment easily. He even gave tips on where to find the best restaurants and cheap eats in Florence.
Highly recommended! Thanks Carmine! :)