Carmen's place was amazing! It's close to Termini station, so you can walk easily from Termini to the airbnb (approx. 10min walk).
Carmen also gave us a perfect description about how to walk to her flat.
All the important must-sees can be reached by foot. It's also very easy to take a metro from Termini to go to the Vatican, for example.
The appartement is very clean, quite big, and has everything you need. There's a supermarket in the neighbourhood, so you can cook something yourself if you want to.
We really enjoyed our stay at Carmen's place and would immediately go back!