Luca, is very helpful and if you contact him, he replies quit quickly.
Location is very good, 20 min walk to Colloseum and Forum Romanum, tube station 5 min away, and close to Termini station.
They only negative thing you can see walking from Termini station is a lot of homeless people in the park which made us a little bit anxieous at first but they were harmless.
Luca's flat is nice and cosy and clean. All you need is there.