Choose Arezzo
I highly recomend the Cultura Italiana Arezzo. I studied for 4 weeks, took a few private lessons and enjoyed of every moment of my stay.
My teachers, Alessandra and Gianmarco, were excellent, very professional and patient. Arezzo is a perfect town to learn italian. It is not crowded by turists and you can feel the real italian atmosphere, food, wine and learn the language at the same time.