We stayed here for one night and wished we would have stayed for longer! The location is excellent - not directly in the center of town so you are a slight distance from the craziness of all the tourists (which was great) but still definitely walkable (an easy and beautiful 10-15 min walk) to all the major sights. There are also many busses that come right around the corner. The piazza in the neighborhood where Marta Guest House is (Piazza Cavour) is the most beautiful one in Rome! The room was clean and staff at reception was incredibly helpful with all of our questions and needs. There are many great cafes and restaurants in the neighborhood. Would highly recommend this place!