The apartment is very clean and comfortable with fully equipped kitchen ( even makineta and great ground cofee, which were very useful). The location is good: 5 min walk to Trastevere, 15 min walk to Coliseum, 7 min walk to Pantheon, 15 min to Trevi Fontain. We didn't use transport to get to the prime spots, besides Vatican of course.
Miryam was very hospitable. She explained us about the neighborhood, good places to eat and how to get easily to the prime spots. There were milk, yougurts, bread, fruit, cookies and even beers for our use.
Miryam gave us an Italian cell phone for our use. It was great when we had to call to order tables in restaurants.
The aprtment is on the 4th floor without an elevator. We didn't have issues with it, but maybe it's something worth to take in account.