Maria's place is located only a short walk from the Pantheon, Trevi Fountain, and about 25 minutes or so from Travastere, which is across the river. The apartment has everything you need while staying in Rome, including nice touches like an authentic, stove-top espresso maker. There were also ample towels, soap and shampoo provided. The apartment itself is nicely decorated. It also feels very safe! It's in an apartment building which always has people coming and going and the streets are very busy even late at night, though surprisingly we did not hear noise at night.
Maria was very responsive to our needs. She had Marian meet us for our check-in which went very smoothly. The only thing is that the television wasn't working. We asked for this to be resolved but we did not have any follow up, so I don't know if it was. The other thing to note is that you cannot eat, drink or smoke on the terrace upstairs. So we didn't even use it. Otherwise we enjoyed our trip to Rome and would recommend this place to anyone thinking of staying here should it suit your needs.