This is a very nice apartment to stay at.
The apartment is very nicely decorated and clean throughout, with large rooms and comfortable beds.
It is conveniently located by the train station Termini (walk ca. 15 minutes down the road from the train station). 30-40 min walk will get you to the Colosseum and other sights and a trip to the Vatican was ca. 50-60 min from the apartment.
Please note that the area around the train station does not make the best first impression when walking to the apartment but the building the apartment is in is very nice. You do hear the trains from the bedrooms, but only in the background and we had no trouble sleeping. I am a light sleeper myself and had no issues whatsoever.
We enjoyed our stay and Nicola prepared a map with suggestion on where to eat which was very kind and we ended up having some great local food.
Check-in and Check-out was very easy and Nicola was always quick to respond in case of questions.