This place is great. The host was wonderful, friendly and informative. The location is ideal as it is very close to the Duomo, and there are a few great pubs on the next street over (The Dublin Pub).
The room is big, with a wardrobe to hang your belongings if you choose. The wardrobe was clean, and did not seem like it was being over perfumed to hide a graver smell (as was my experience in the other places I stayed)!
The washroom isn't private per se, it is right outside the door of the room and while I know there were people in the room near ours, we never saw them, nor did we observe any evidence using the washroom.
I would recommend anyone book this location, and I know the next time I go to Florence (which was my favourite place in Italy...and Siena actually) I will be booking it.
Lovely place!