Maurizio's apartment is very well located: 3-4 minutes from a bus stop; 10 minutes walk from Termini station (the main railway in Rome, with trains, buses, metro); 20-25 minutes walk from the Colosseum. The neighborhood is very vibrant, with lots of small Italian-style restaurants with excellent food.
Maurizio was a great host, responsive and helpful. The apartment is on the second floor, clean and cozy. Good value for the money. Would definitely recommend.