What a amazing experience! Pietro's house is super nice! We loved the apartment. The bedroom was very big, clean and warm. The bathroom was the same: big and clean. The apartment is less than five minutes from the Campo di Marte station and it costs 1.5 euro to go the Santa Maria Novella Station (which is in the centre of town). It is also easy to walk to town and the way is very beautiful (we spent around 25 minutes). Although the apartment was really nice, the best thing for us was Pietro and his family! He was very kind and explained the places we should visit and where to eat. If you're planning to go to Firenze you should consider Pietro's house!