First - Location Location Location! The place is in the actual center of Florence (which is not too big) and not more than 15 minutes walking to EVERYWHERE. We couldn't find anywhere better to stay!
Breditz and Nadja were both very welcoming and nice and gave us some great tips for sightseeing and for eating.
The place is very equipped, clean and organized.
We did notice that because of the great location, it is quite noisy but not different than other parts of the center.
You should know that there is another room that is rented in the house for other Airbnb guests.
Also, as in all Italy, one must know that there is an additional tax - about 3.5 Euro per person per night.
We are definitely coming back to stay there :-)