Overall I thoroughly enjoyed my stay in Jaime's place. The best feature is it's central location- it's right in the middle of everything in Roma.
As described in the listing, it is an older building with thin glass windows so sound really travels. I think many of the units in the apartment are Airbnb and they aren't necessarily booked, so if not then it feels quiet. However, when full you will hear the other guests.
Besides the sound issue it's a great spot and I'd definitely recommend it for single travelers looking for strong value and a central location in DF.