Good location in a few steps from Trevi, Pantheon and Spanish steps. In fact it is a bit too loud in the night time. The apartment is clean and nice. Communication with the agency was smooth. A couple of watch outs: the floor is cold (we were in April), bring your flip-flops. The mattress is tricky — these were actually two single bed ones brought together which was not very convenient.
Anyway it’s a fine apartment to stay for a couple days in Rome.