Massimo's house is located on a good spot at the center of Florence and is very comfortable and clean.
If you are travelling by car you should be careful not to enter the center as there is an automatic system that tracks entering cars. The town center is not allowed freely for everyone. You should not have a problem if you communicate this with Massimo prior arrival.
Other than that, we are very happy with our stay - Massimo and his lovely wife recommended some great restaurants and places to visit.
We are very thankful.