The apartment is super cozy, well equipped, and has a superb location. Moreover, the apartment looks even better than in the pictures. I had it for the first time that I got better than what I saw in the pictures.
It is super easy to get to the apartment from the airport. And I barely used any public transport as you can walk everywhere, on average it took me about 20-25 mn by foot to get to sightseeing places or walk to Trastevere or Monti. You can find good restaurants and food at your door so to speak :) Not only shops and restaurants are at your doorstep, but in around 5 mn (on a parallel street), there is a good supermarket, so you can do groceries and cook at home if you want.
Massimo is a super host. He is very responsive, waited for an hour for me as my flight was delayed, and provided me with an extensive guide on the city that helped me with scouting some places for coffee and food.
I would highly recommend Massimo and this apartment to anyone who is planning his/her trip to Rome.