I strongly recommend this flat for the following reasons:
1) location. In centro storico, quiet and peaceful, less than 10 minutes away from Metro and about 2-3 minutes from the central roads of centro storico. By foot.
2) top cleaning.
3) the house has everything you need for a short stay. the only thing you have to remember is that there is no kitchen to cook by yourself. But this would may be a problem only for someone who wants to stay for weeks. Or not, once there are plenty of pizzerias in the area :P
4) The hostes are very very kind and helpful with everything you may need.
5) Although the place is "private room" in a bigger home, it is really separated from the rest of the house. It is like having a home all by your own. So, you shouldn't worry about privacy.
6) price. The chepiest in the area.