We had a great stay at the Orso Apartment, mainly because it couldn't be more in the centre of Rome than this. Most of the must-see monuments were at a walking distance. Also, the apartment was clean and the airconditioning was working well. The owner was very helpfull, for example she helped us with a taxi from and to the airport which was very nice. In short, I would certainly book this appartment again if I go back to Rome.