We spent 4 nights at Andrea's loft. It is spacious, modern and very well equipped. The place was clean.
Andrea was a really helpful host, he allowed us to check in earlier, which was really convenient as we travelled with a baby. He supplied us with a cot and anything else we would need.
The loft is in a quiet pedestrian street, very well located (close to tran/bus/metro station) as well as close to all amenities. You can walk easily to some roman attractions.
Overall, we really enjoyed our stay at Coloftsseum and would recommend it.