I would highly recommend this apartment.
We received a very warm welcoming from Mattia who took plenty of time to explain every detail of the apartment and even created a guide of places to see, eat, etc. for us.
The description of the place was very accurate with two large bedrooms and two bathrooms. The apartment was clean, the kitchen fully equipped, there was wifi, tv and hairdryers (yes, two). Mattia had even left coffee, water and pasta for us. The only thing missing was a washing machine, which was not a problem for us but it is worth knowing.
The neighbourhood is very well located. A 20 minute stroll to the Coliseum and less than 5 minutes to San Giovanni Laterano. It is very well communicated by public transport too with both metro and bus.
Mattia was in constant touch with us to ensure that everything was OK and we were not missing anything. On our last day he even helped us store our luggage once we had vacated the apartment.
All in all, a great experience and good value.