The apartment proved to be exactly as stated and surprised me on how quiet it was considering how close to the Tiber it is.
Alberto gave us an excellent introduction to the area (as well as a brief history lesson) on our check in and from there it was plain sailing.
All of Rome's major sites are easily accessable by foot from the apartment or if need be, the public buses are just moments away.
I really can't rate the location highly enough and I strongly suggest staying here if you are travelling to Rome. I've been to Rome plenty of times and Trastevere is a gem as is Lisa and Alberto's apartment.