We did not have the opportunity to meet Bruno in person, we met his son Valerio instead who let us in the apartment and informed us of all the necessary things. However, Bruno was always responsive when we reached out with questions.
Bruno's apartment is in an excellent location. It is within 3 minute walking distance to the metro and halfway to both the Trevi Fountain and the Spanish steps (which are on opposite sides). We originally thought we would take the metro to go to further sites such as the Colloseum and the Vatican, but Rome is a small big city. You can walk anywhere. We actually walked to the Vatican from Bruno's apartment and it was a leisurely 35 minute stroll.
Overall, Bruno's apartment is very clean and has all the basics you need for a comfortable stay. It is large by Italian standars (the other apartments we stayed in Venice and Florence were much smaller.)
I would highly recommend Bruno's apartment to anyone who wants to stay at a good location in Rome and not pay a fortune.