The apartment is beautiful and super convenient, the beds are very comfortable, Internet was good, the location is amazing and Raffaella is extremely helpful to help organizing the best stay in Rome (I totally recommend her taxi contacts).
The place is right in the center, we walked to Trevi, Colosseum, Vatican etc.... It's surrounded by lots of restaurants. The windows are extremely well isolated but it is of course not 100% sound proof since you are right in the center of a big city. This did not disturb us though.
We have had a great stay and really enjoyed everything in the appartement as a group of entrepreneurs working and touring together.