Mario had a good backup as he was out of town and had friend wait for us, much appreciated as our flight was delayed to Rome.
His place is truely an artist's haven, great art. The location is great if you do not want to be in a tourist mecca, you can mix with the locals and get a real feel to live as an Italian in Rome.
The Metro is an easy walk and will get you into Termini within 20 mins.
Mario's local eatery recommendations (included in the listing) is a brilliant idea. I'd recommend La Margarita as a place for an evening meal. The portions are large so chose carefully and the prices are very resonable.