My husband and I stayed 3 nights at Amen's apartment and it was a wonderful stay and just as expected! The apartment was spotless and had a mini kitchen if one wanted to cook their meals. We met Marco and he was friendly, told us a little bit about the city and provided us with a mobile for local calls which I thought was a nice touch.
The location is just in the outskirts of Central Rome - around 13 minutes walk from Termini main station and quite easy to zip around from. As mentioned in other reviews the bathroom is on the smaller side, however was very clean and fully met our needs.
Thanks for being such wonderful hosts Amen and Marco!